Common octopus

Fish · Last reviewed 2026-08-16

A solitary, short-lived, startlingly intelligent mollusc taken by hand, hook and spear across the eastern Atlantic and Mediterranean — and the animal FishingHQ had written handling guidance for without holding a record of it.

Safety

Species that bite — Minor injury

The beak at the centre of the arm web is the only hard part of the animal and is built to break crab shell. A bite is a puncture wound, octopus saliva is biologically active, and marine puncture wounds are prone to infection.

What reduces it: Keep the underside of the arm web away from bare skin and keep fingers out of the centre of it. Use a sealing catch bag rather than carrying the animal against your body. Clean any bite properly and seek medical advice if it becomes inflamed.

Worse when:

Carrying a live octopus against bare skin or in an open bag.
Reaching blind into a crevice to feel for an animal.

Fish welfare — Can cause injury needing treatment

The evidence for cephalopod sentience is strong, and the traditional dispatch methods — beating the animal, or leaving it to die in air in a bag or bucket — are precisely those the reviews recommend against. Separately, taking a female brooding egg strings destroys an entire clutch alongside an animal that had stopped feeding and would have died at hatching anyway.

What reduces it: Kill an octopus intended for the table immediately and decisively by destroying the brain between and behind the eyes. Do not take animals you do not intend to use, and do not leave one to die slowly. Leave any den containing egg strings alone and move to the next hole.

Worse when:

Hot conditions, where an animal left in a bag dies slowly and the flesh spoils as well.
Following traditional or online practice uncritically.
Brooding season, when females are concentrated in dens and are the easiest animals to find.

Precautions that always apply here

Keep fingers out of the gills and clear of the teeth. Gill damage is usually fatal to the fish, and several species will remove skin from a finger.
Wet your hands before touching a fish. Dry hands strip the protective mucus layer that keeps infection out.

The common octopus is one of the most widely taken non-finfish quarry animals in the world and, until now, the clearest hole in this catalogue: FishingHQ carried a record on handling squid, cuttlefish and octopus, and another on taking octopus on breath-hold, with no octopus for either to point at.

IT IS A MOLLUSC WITH A VERTEBRATE'S PROBLEM-SOLVING. Eight arms with no internal skeleton, a beak that is the only hard part of the body, chromatophores that change colour and texture in under a second, and a demonstrated capacity to open containers, use shelter tools and learn by observation. The evidence for cephalopod sentience is strong enough that a number of jurisdictions now regulate their handling and killing.

AND IT LIVES ABOUT AS LONG AS A LARGE DOG DOES NOT. Most common octopus live one to two years, breed once, and die. The female stops feeding to guard her eggs and dies as they hatch. That single fact — semelparity on a one-year cycle — is why populations swing so violently between seasons and years, and why octopus abundance is far more responsive to water temperature and food than to fishing effort in any given month.

IT IS FOUND BY READING A DEN RATHER THAN BY SEARCHING WATER. An octopus in residence collects, and the litter of shells, crab carapaces and stones outside a hole — the midden — announces the occupant long before the animal is seen.

Identification

FishingHQ holds no photograph of this species whose identity and licensing it can vouch for, so it is not showing one. Misidentified fish photographs teach identification wrongly, and a picture with an unchecked caption would be worse than none. The identification points below are what to look at instead.

Scientific name: Octopus vulgaris
Family: Octopodidae
Water: Saltwater
Conservation status: Least Concern
Regions: Mediterranean, Western Europe, Britain & Ireland, West Africa, North Africa

EIGHT ARMS, no tentacles. A squid or cuttlefish has eight arms plus TWO long feeding tentacles; an octopus has eight limbs and nothing else. This separates the groups instantly.
TWO ROWS OF SUCKERS along each arm. The curled octopus of northern European waters, Eledone cirrhosa, has a SINGLE row — the fastest way to tell the two apart where both occur.
No internal shell and no fins. A cuttlefish has a calcified cuttlebone and a fin skirt; a squid has a stiff internal pen and terminal fins; an octopus is a soft bag with a beak.
Colour and texture change continuously and are not identification characters at all. The same animal will be brick red, mottled brown, pale grey and warty within seconds.
A midden of shells, crab carapaces and stones outside a hole in rock or reef indicates an occupied den, and is what a searching diver actually looks for.
Arm span commonly around a metre; noticeably larger and longer-armed than the curled octopus.

Size

Typical: 1–4 kg with an arm span around 60–100 cm.
Large: Over 6 kg is a large one in most of the range.

Exceptional: Around 10 kg and an arm span approaching 1.3 m is the widely reported upper end. Very large individuals are old by the standards of an animal that rarely sees a second birthday.

Lifecycle and reproduction

Short and terminal. Common octopus hatch from eggs as tiny planktonic paralarvae, drift and feed in the water column for weeks before settling to the bottom, then grow extremely fast on a diet of crustaceans and molluscs. Most individuals live one to two years. Reproduction happens once: the male transfers a spermatophore using a modified arm and dies within months; the female lays tens or hundreds of thousands of eggs in strings inside a den, stops feeding entirely to tend and aerate them, and dies as they hatch. This is semelparity — breed once, then die — and it means a population is effectively rebuilt from scratch every year or two.

The female's brooding period runs to weeks or months depending on temperature, during which she does not feed and defends the den continuously. Because she dies at hatching and the male dies after mating, there are no repeat spawners and no accumulated reserve of large old breeders in the population. The practical consequences are direct: abundance swings sharply with temperature and food supply between years, a good octopus season is not evidence that the next will be, and a brooding female taken from a den costs the entire clutch she was tending as well as the animal.

Feeding and senses

A nocturnal ambush hunter of crustaceans and molluscs — crabs above all, then bivalves, gastropods and small fish. The octopus envelops prey in the arm web, and either bites through the shell with its beak or drills it and injects a paralysing, digestive saliva. Crab remains and drilled shells are the diagnostic litter of a den. In practical terms this is why crab is the near-universal octopus bait and lure, and why a jig or lure that behaves like a crab on the bottom outperforms anything that swims.

Vision is excellent and the eye is a genuinely camera-like eye evolved entirely independently of the vertebrate one — and yet the animal is almost certainly colour-blind, achieving its colour matching by other means. Touch and chemoreception are distributed: the suckers taste as well as grip, and a very large share of the nervous system sits in the arms rather than the brain, so an arm exploring a crevice is doing a great deal of its own processing. Practically, an octopus sees a diver clearly and early, judges intent, and will either flatten into a crevice or leave.

Through the year

Strongly seasonal in shallow water and strongly variable between years. Animals move inshore to feed and breed in warmer months across much of the range, with abundance in any given season depending on recruitment from a short-lived population rather than on a stable stock. Because the whole population turns over in one to two years, a run of favourable temperature can produce a conspicuous local abundance and an unfavourable one can produce near-absence, and neither is a stable baseline.

Distribution

Eastern Atlantic from the southern North Sea and the English Channel south along the European and African coasts, throughout the Mediterranean, and around the Atlantic islands. Occupies rock, reef, rubble and seagrass from the intertidal down to around 200 m, denning in holes, crevices and any container it can occupy. Assessed by the IUCN as Least Concern, which reflects a fast-growing, highly fecund, short-lived animal rather than an absence of local depletion — octopus fisheries can and do exhaust local ground within a season.

This is a biological range — where the species occurs, not a prediction that you will catch one. To browse the fishing geography FishingHQ holds, start at fishing places.

Why anglers care

A major quarry in its own right across southern Europe, north-west Africa and the Atlantic islands, taken by hand and hook while snorkelling or freediving, by pot and by shore fishing with crab-imitating lures. It is also central to the food culture of much of its range in a way few catalogue species are — pulpo in Galicia, polvo in Portugal, htapodi in Greece — and it is one of the species where handling and dispatch have become a live regulatory question because of the sentience evidence. For FishingHQ its significance is partly structural: it closes a hole where two existing records described handling an animal the catalogue did not hold.

Handling and returning

An octopus is strong, boneless, and extremely good at not being held. It will move into any gap, grip with hundreds of suckers, and a large one is genuinely difficult to control; a catch bag that seals is not optional, because an octopus in an open bag leaves. THE BEAK IS THE ONLY HARD PART AND IT BITES. It sits at the centre of the arm web on the underside, it can break shell, and a bite is a puncture that can be venomous to a degree in some species and is prone to infection in all of them — keep the web away from bare skin and keep fingers away from the centre. On DISPATCH: the sentience evidence for cephalopods is strong, several jurisdictions now regulate their killing, and the practices the reviews recommend against are the traditional ones — beating the animal, or leaving it to die slowly in air or in a bucket. An octopus intended for the table should be killed immediately and decisively by destroying the brain between the eyes, not allowed to die by exhaustion. On the water: chill immediately, because cephalopod flesh degrades quickly in warmth. AND DO NOT TAKE A BROODING FEMALE from a den holding egg strings — she has stopped feeding, she will die at hatching in any case, and taking her destroys the whole clutch as well.

One year, one clutch, then death — and what that does to a fishery

Almost everything unusual about octopus fishing follows from a life history that no fish in this catalogue shares.

THE ANIMAL BREEDS ONCE AND DIES. Common octopus generally live one to two years. The male mates, passing a spermatophore with a modified arm, and dies within months. The female lays tens or hundreds of thousands of eggs in strings inside a den, then STOPS FEEDING ENTIRELY to guard and aerate them, and dies as they hatch. This is semelparity, and it means there is no such thing as an old breeding octopus holding a population together.

SO THE POPULATION IS REBUILT FROM SCRATCH EVERY YEAR OR TWO. There is no reserve of large mature animals accumulating over decades in the way there is for a tope or a skate. What exists in any season is essentially the survivors of one or two recruitment events.

WHICH IS WHY ABUNDANCE SWINGS SO VIOLENTLY. Temperature and food supply during the planktonic and early benthic phase determine how many animals survive to be catchable, and the effect is large and fast. A conspicuous local abundance one year genuinely tells you very little about the next, and reasoning from 'there were octopus everywhere last summer' is reasoning from a population that no longer exists.

IT ALSO MEANS LOCAL DEPLETION IS REAL DESPITE A LEAST CONCERN LISTING. The global assessment reflects a fast-growing, hugely fecund, widely distributed animal. It does not mean a particular headland cannot be cleared out within a season, because the animals there are a single short-lived cohort and there is nothing behind them.

AND IT MAKES ONE SPECIFIC DECISION MATTER MORE THAN ANY OTHER. A den containing egg strings holds a female who has stopped eating and will die when they hatch. Taking her adds one animal to a bag and removes the entire clutch, at the one point in the life cycle where the population is most concentrated in a single individual. It is the clearest case in this catalogue where leaving an animal is straightforwardly the right call, and it costs nothing but a walk to the next hole.

THE FLIP SIDE IS ENCOURAGING. A short-lived, fast-growing, extremely fecund animal recovers quickly when ground is left alone — far faster than any elasmobranch. Rotation between areas, and simply not stripping a piece of reef, works here in a way it does not for slow-breeding species.

NOTHING HERE STATES WHETHER THIS ANIMAL MAY BE TAKEN WHERE YOU ARE. Tropical fisheries rules are frequently set island by island, state by state or park by park rather than nationally, several of these species are protected somewhere in their range, marine reserves are common and their boundaries are not obvious from the water, and the rules are revised. Ask the local fisheries authority or park authority before fishing, spearing or gathering.

Scientific evidence

Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.

FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic identification characters, family placement, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
The IUCN Red List of Threatened Species — International Union for Conservation of Nature (Conservation authority)Relied on for: The global Red List category and the population assessment behind it, which is a statement about the species rather than about any managed fishery.States this directlyCitation checked — the work exists and is described correctly
FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Distribution, maximum size, depth range, habitat association and biology as compiled for the species.States this directlyPassage read and verified

Reading a den, crab baits, and killing an animal the evidence says is sentient

Finding an octopus is a search for evidence rather than for the animal, and taking one raises a question most quarry does not.

THE MIDDEN GIVES IT AWAY. An octopus in residence brings food home and discards the remains at the entrance. A scatter of crab carapaces, broken bivalve shells — often DRILLED, with a neat hole where the animal bored through — and gathered stones outside a crevice is an occupied den. Divers and shore hunters look for the litter, not the octopus.

THE ANIMAL ITSELF IS BUILT NOT TO BE SEEN. Chromatophores change colour and skin texture in well under a second, and an octopus flattened into a crevice against matching rock is genuinely invisible from a metre away. Colour is therefore useless as an identification character and useless as a search cue.

CRAB IS THE ANSWER TO ALMOST EVERY BAIT QUESTION. The diet is dominated by crabs, and the whole apparatus — the arm web that envelops, the beak that breaks shell, the saliva that drills and paralyses — is built around them. This is why crab-imitating jigs and lures worked slowly on the bottom outfish anything that swims, and why a real crab is the traditional bait wherever it is lawful.

THE HUNT IS SLOW AND SHALLOW — snorkelling and shallow freediving over rock and rubble, worked methodically along structure. The depth is modest and the skill is observational.

AND THEN THERE IS THE PART THAT HAS CHANGED. The evidence for sentience in cephalopods is strong — strong enough that formal reviews have concluded it and that several jurisdictions now regulate how these animals are handled and killed. That has practical consequences an angler can act on immediately.

KILL IT IMMEDIATELY AND DECISIVELY IF IT IS FOR THE TABLE. The traditional methods the reviews specifically recommend against are the ones most often described online: beating the animal against rock, or simply leaving it in a bag or bucket to die in air. An octopus taken for food should be killed at once by destroying the brain, which lies between and behind the eyes.

DO NOT LEAVE ONE TO DIE SLOWLY, and do not take one you do not intend to use.

CHILL IT AT ONCE. Cephalopod flesh degrades fast in warmth, and octopus is generally taken in warm places.

AND WATCH THE BEAK. It sits at the centre of the arm web underneath, it is the only hard structure in the animal, and it breaks crab shell for a living. Keep the underside of the web away from bare skin, and keep fingers out of the middle of it.

Authoritative guidance

Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.

Review of the evidence of sentience in cephalopod molluscs and decapod crustaceans — LSE Consulting, LSE Enterprise Ltd, The London School of Economics and Political Science, 2021 (Scientific literature)Relied on for: The evidence for sentience in cephalopod molluscs and decapod crustaceans, and the handling and killing practices the review recommends against.States this directlyCitation checked — the work exists and is described correctly
FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic identification characters, family placement, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
BlueWater Hunting and Freediving — BlueWater Freedivers, Ventura, California, 1995 (Practitioner report)Relied on for: Blue-water and reef spearfishing practice, including quarry behaviour, approach and the judgement involved in deciding whether to take a shot.States this directlyCitation checked — the work exists and is described correctly
General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated descriptions of species behaviour and regional fishing practice, recorded as consensus rather than as scholarship.Background and mechanism onlyCitation checked — the work exists and is described correctly

Where to go next

How it is caught

What these connections rest on (3)

Practitioner consensus — 3 connections

Widely and independently recommended by experienced anglers and specialist sources. This is real angling knowledge, not proof: controlled evidence for it is limited, and FishingHQ records it as convention rather than as a demonstrated effect.

Eging
A statement about how a species is taken, which is practice convention rather than biology and is labelled as such.
- BlueWater Hunting and Freediving — BlueWater Freedivers, Ventura, California, 1995 (Practitioner report)Relied on for: Reef and blue-water breath-hold hunting practice, including quarry behaviour, approach, catch handling and the judgement involved in taking a shot.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated descriptions of quarry behaviour and regional fishing practice, recorded as consensus rather than as scholarship.Background and mechanism onlyCitation checked — the work exists and is described correctly
Recreational potting
A statement about how a species is taken, which is practice convention rather than biology and is labelled as such.
- BlueWater Hunting and Freediving — BlueWater Freedivers, Ventura, California, 1995 (Practitioner report)Relied on for: Reef and blue-water breath-hold hunting practice, including quarry behaviour, approach, catch handling and the judgement involved in taking a shot.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated descriptions of quarry behaviour and regional fishing practice, recorded as consensus rather than as scholarship.Background and mechanism onlyCitation checked — the work exists and is described correctly
Shore diving
A statement about how a species is taken, which is practice convention rather than biology and is labelled as such.
- BlueWater Hunting and Freediving — BlueWater Freedivers, Ventura, California, 1995 (Practitioner report)Relied on for: Reef and blue-water breath-hold hunting practice, including quarry behaviour, approach, catch handling and the judgement involved in taking a shot.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated descriptions of quarry behaviour and regional fishing practice, recorded as consensus rather than as scholarship.Background and mechanism onlyCitation checked — the work exists and is described correctly

Where it lives

What these connections rest on (3)

Scientific evidence — 3 connections

Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.

Coral reef
A distributional claim about where a species is found, resting on the standard identification and compilation sources rather than on fishing report.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic characters, habitat association, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Distribution, maximum size, depth range, habitat association and biology as compiled for the species.States this directlyPassage read and verified
Kelp forest
A distributional claim about where a species is found, resting on the standard identification and compilation sources rather than on fishing report.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic characters, habitat association, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Distribution, maximum size, depth range, habitat association and biology as compiled for the species.States this directlyPassage read and verified
Rocky shores and reefs
A distributional claim about where a species is found, resting on the standard identification and compilation sources rather than on fishing report.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic characters, habitat association, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Distribution, maximum size, depth range, habitat association and biology as compiled for the species.States this directlyPassage read and verified

Where you will find it

What these connections rest on (3)

Scientific evidence — 3 connections

Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.

Cape Verde
A distribution edge resting on published regional identification and distribution references, written where the species is genuinely characteristic of the destination's fishing rather than merely recorded from its waters.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Distribution, habitat association and biology of the fishes of the eastern central Atlantic and the Mediterranean, from the regional identification guides prepared for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Recorded environment, depth range, distribution and biology of the species named.States this directlyPassage read and verified
Portugal
That a species occurs in these waters, drawn from distribution science and stock assessment. It is a statement about where the animal lives and is not a statement that anybody will catch one, still less where.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Identification, distribution and habitat association of the fishes and invertebrates of the Mediterranean and Black Sea.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Recorded distribution, depth range and habitat association of the species named.States this directlyPassage read and verified
Spain
That a species occurs in these waters, drawn from distribution science and stock assessment. It is a statement about where the animal lives and is not a statement that anybody will catch one, still less where.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Identification, distribution and habitat association of the fishes and invertebrates of the Mediterranean and Black Sea.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Recorded distribution, depth range and habitat association of the species named.States this directlyPassage read and verified

Understanding this fish

What these connections rest on (5)

Scientific evidence — 2 connections

Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.

Bivalve and gastropod molluscs as prey
A dietary claim recorded at GROUP level against a modelled prey concept, because the sources describe the prey as a group and this catalogue holds no species record from the right ocean to point at.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic characters, habitat association, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Distribution, maximum size, depth range, habitat association and biology as compiled for the species.States this directlyPassage read and verified
Decapod crustaceans as prey
A dietary claim recorded at GROUP level against a modelled prey concept, because the sources describe the prey as a group and this catalogue holds no species record from the right ocean to point at.
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic characters, habitat association, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Distribution, maximum size, depth range, habitat association and biology as compiled for the species.States this directlyPassage read and verified

Practitioner consensus — 3 connections

Handling a large fish for the table
A record pointing at the practice or mechanism that explains it, so the explanation lives once rather than being restated on every quarry page.
- BlueWater Hunting and Freediving — BlueWater Freedivers, Ventura, California, 1995 (Practitioner report)Relied on for: Reef and blue-water breath-hold hunting practice, including quarry behaviour, approach, catch handling and the judgement involved in taking a shot.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated descriptions of quarry behaviour and regional fishing practice, recorded as consensus rather than as scholarship.Background and mechanism onlyCitation checked — the work exists and is described correctly
Handling squid, cuttlefish and octopus
A record pointing at the practice or mechanism that explains it, so the explanation lives once rather than being restated on every quarry page.
- BlueWater Hunting and Freediving — BlueWater Freedivers, Ventura, California, 1995 (Practitioner report)Relied on for: Reef and blue-water breath-hold hunting practice, including quarry behaviour, approach, catch handling and the judgement involved in taking a shot.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated descriptions of quarry behaviour and regional fishing practice, recorded as consensus rather than as scholarship.Background and mechanism onlyCitation checked — the work exists and is described correctly
Octopus and cuttlefish on breath-hold
A record pointing at the practice or mechanism that explains it, so the explanation lives once rather than being restated on every quarry page.
- BlueWater Hunting and Freediving — BlueWater Freedivers, Ventura, California, 1995 (Practitioner report)Relied on for: Reef and blue-water breath-hold hunting practice, including quarry behaviour, approach, catch handling and the judgement involved in taking a shot.States this directlyCitation checked — the work exists and is described correctly
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated descriptions of quarry behaviour and regional fishing practice, recorded as consensus rather than as scholarship.Background and mechanism onlyCitation checked — the work exists and is described correctly

Told apart from

Curled octopusOne row of suckers on each arm against two, and it decides the question completely. The curled octopus is the northern one and is what nearly every British capture actually is; the common octopus is the southern one the world means by octopus.

What these connections rest on (1)

Practitioner consensus — 1 connection

Curled octopus
A comparison a reader with the animal or the decision in front of them genuinely needs.
- The Fishes of the British Isles and North-West Europe — Macmillan, 1969 (Reference work)Relied on for: Distribution, habitat association, identification and biology of the fishes and inshore fauna of the British Isles and north-west Europe.States this directlyCitation checked — the work exists and is described correctly
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic characters, family placement, habitat and depth range as set out in the FAO species identification sheets for the region concerned.States this directlyCitation checked — the work exists and is described correctly

Scientific evidence — 1 connection

Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.

Curled octopus
Taxonomic and practical relatedness, with the evidence naming the species the edge is about.
- The Fishes of the British Isles and North-West Europe — Macmillan, 1969 (Reference work)Relied on for: Identification characters, family placement and biology of Octopus vulgaris and of the species it is confused with, as set out for the fauna of the British Isles and north-west Europe.States this directlyCitation checked — the work exists and is described correctly
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic characters and family placement of Octopus vulgaris as set out in the FAO species identification sheets for the region concerned.States this directlyCitation checked — the work exists and is described correctly

Safety reading

Handling fish safelyThe beak at the centre of the arm web is the only hard part of the animal and breaks crab shell for a living. Keep the underside of the web away from bare skin.

What these connections rest on (1)

Authoritative guidance — 1 connection

Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.

Handling fish safely
A hazard the species genuinely presents, joined to the record that explains how to manage it.
- NOAA Diving Manual: Diving for Science and Technology — National Oceanic and Atmospheric Administration, US Department of Commerce (Scientific institute)Relied on for: Diving practice and marine hazard management, including behaviour around large marine animals and the management of envenomation injuries.States this directlyCitation checked — the work exists and is described correctly

Environment and conservation

Fish stocks and sustainabilitySemelparous on a one-to-two-year cycle: the population is rebuilt from scratch every year or two, abundance swings violently with temperature, and a Least Concern listing does not prevent a headland being cleared within a season.

What these connections rest on (1)

Scientific evidence — 1 connection

Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.

Fish stocks and sustainability
A conservation claim about a species with a documented assessment, joined to the environmental issue it exemplifies.
- The IUCN Red List of Threatened Species — International Union for Conservation of Nature (Conservation authority)Relied on for: The global Red List category and the assessment behind it, including the reproductive and habitat factors driving it.States this directlyCitation checked — the work exists and is described correctly
- Code of Conduct for Responsible Fisheries — Food and Agriculture Organization of the United Nations, Rome, 1995 (Standards body)Relied on for: Principles for responsible capture, including selectivity, the treatment of berried and undersized animals, and the precautionary approach.Background and mechanism onlyCitation checked — the work exists and is described correctly

Check the rules before you fish

Fishing laws, bylaws, access rules, seasons, bait restrictions and permitted methods vary by location and can change. Check the current rules from the relevant authority and the water you intend to fish before fishing.

Check with:

Current national or regional law for where you are fishing
Current local bylaws
The relevant fisheries authority
The landowner, club or fishery whose water it is
Any restrictions specific to the species or the method you intend to use

Sources for this page

FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Diagnostic identification characters, family placement, depth range and distribution as set out in the FAO species identification guides for fishery purposes.States this directlyCitation checked — the work exists and is described correctly
The IUCN Red List of Threatened Species — International Union for Conservation of Nature (Conservation authority)Relied on for: The global Red List category and the population assessment behind it, which is a statement about the species rather than about any managed fishery.States this directlyCitation checked — the work exists and is described correctly
FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Distribution, maximum size, depth range, habitat association and biology as compiled for the species.States this directlyPassage read and verified
Review of the evidence of sentience in cephalopod molluscs and decapod crustaceans — LSE Consulting, LSE Enterprise Ltd, The London School of Economics and Political Science, 2021 (Scientific literature)Relied on for: The evidence for sentience in cephalopod molluscs and decapod crustaceans, and the handling and killing practices the review recommends against.States this directlyCitation checked — the work exists and is described correctly

How FishingHQ labels evidence is explained in the evidence policy.

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