Island grouper
Fish · Last reviewed 2026-08-25
The Macaronesian endemic grouper — the other Canary mero, assessed as Vulnerable, and the fish the islands' size limits are strictest about.
Safety: injury while handling fish — minor injury.
Catching Island grouper
Everything here on fishing for it. Each entry opens the page behind it.
- Ground
There are two groupers on Canarian rock. The mero of Spanish-language island sources is the dusky grouper, *Epinephelus marginatus*. The abade is the other one, and it is the one with a problem.
*Mycteroperca fusca* is known with certainty only from the Azores, Madeira, Cape Verde and the Canaries. That is the whole of its world range — four archipelagos in the eastern Atlantic and nothing else. It is a long-bodied, brown to grey-brown grouper mottled and blotched paler, reaching a FishBase maximum of 80 cm and 3 kg, living demersally from about 1 to 200 m and commonly between 20 and 30 m, over rock, cave and reef.
The IUCN assessed it as VULNERABLE in 2016 under criterion B2ab(v), which is a small-area criterion with an observed decline in mature individuals — the assessment a species gets when it lives in a restricted place and there is less of it than there was. FishBase gives it low resilience. The Canary fisheries directorate sets one of the largest minimum landing sizes in its table for it under both state and regional rules.
So the honest way to write it up is not as a prize. It is a slow-growing, restricted-range, declining fish that people fish for hard because it is large and it is excellent to eat, on ground where it is easy to find because it is site-faithful and lives in holes. Groupers of this kind are also the classic spearfishing casualty: a fish that holds its ground rather than fleeing is a fish a diver can take repeatedly from the same cave until there are none.
What that means in practice for somebody fishing the islands is: know what you have caught, know that the size limit on it is not arbitrary, and take the directorate's current rules rather than this page's word for what they are.
How it is caught
Identification
No photograph of Island grouper has passed identity review yet, so none is shown. FishingHQ publishes a species photograph only once somebody has confirmed the animal in it against the species record’s own diagnostic features.
- Scientific name
- Mycteroperca fusca
- Family
- Epinephelidae
- Water
- Saltwater
- Conservation status
- Vulnerable
- Regions
- Western Europe, West Africa
- A long-bodied grouper rather than a deep one — Mycteroperca are slimmer and more elongate than the heavy-set Epinephelus.
- Brown to grey-brown, mottled and blotched with paler markings, and able to change shade quickly.
- The dusky grouper it shares ground with is deeper-bodied, heavier-headed and reaches more than twice the weight.
- FishBase records a maximum of 80 cm and 3 kg.
- Range is diagnostic in itself: FishBase records it with certainty only from the Azores, Madeira, Cape Verde and the Canaries.
Size
- Typical
- 1–2 kg (2.2–4.4 lb)
- Large
- 2.5 kg (5.5 lb) and over
Exceptional: FishBase records a maximum of 80 cm and 3 kg
Lifecycle and reproduction
Demersal over a depth range of 1 to 200 m and usually 20 to 30 m, on rock, reef and cave ground. FishBase gives it LOW resilience, which combined with a range restricted to four archipelagos is the whole argument behind its conservation status.
Groupers are typically protogynous hermaphrodites maturing as female and becoming male with size, and this species' own reproductive detail is not established on the FishBase record. The general consequence for a fish of this type is stated where it belongs: size-selective fishing on a protogynous population removes the males, and that is a structural pressure rather than a numerical one.
Feeding and senses
An ambush predator on fish and cephalopods, working from cover in rock and reef and taking prey with a rapid suction strike. It is site-faithful, holding to particular holes and overhangs — which is what makes it findable, and what makes it vulnerable.
Sight and lateral line at close range from cover, in the clear water of the islands. Its site fidelity is the practically important trait rather than any sensory one: a grouper found on a mark is a grouper that will be on the same mark next week, and that cuts both ways.
Through the year
Resident year-round on the same ground rather than seasonal, with larger fish holding deeper. Site fidelity rather than seasonality is the fact that governs it: a grouper is where it was, which is why a mark can be fished out and why the size limit exists.
Distribution
Eastern Atlantic: known with certainty only from the Azores, Madeira, Cape Verde, and the Canary Islands
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 prime Macaronesian target from rock, boat and spear, taken on fish and cephalopod baits and on jigs worked around structure. It is also a fish that should not be written up as a prize without the rest of the sentence: endemic to four archipelagos, assessed as Vulnerable with an observed decline, low in resilience, and carrying one of the largest minimum landing sizes the Canary directorate publishes. Anybody fishing for it should check the current rules with that directorate rather than with any website.
Handling and returning
Powerful jaws and a hard bony gill cover with a sharp edge. Support a large fish horizontally rather than by the jaw — a grouper hung vertically by the lower jaw can be damaged internally by its own weight. Fish taken from depth suffer barotrauma, and a fish that cannot swim down is a fish that will not survive release however carefully it is handled.
Safety
Injury while handling fish — Minor injury
The gill covers carry sharp bony edges and the mouth is large and full of small rasping teeth, on a heavy fish that thrashes when it is lifted.
What reduces it: Support the fish horizontally with a wet hand under the belly, keep fingers out of the gill opening, and unhook with pliers.
Where to go next
Similar and related fish
Where it lives
More fish
Not related to this page — just the rest of the section. There is little else joined to this subject yet, and a short page should still lead somewhere.
Sources and evidence
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Family, maximum size, depth range, environment, distribution and the IUCN assessment for Mycteroperca fusca.States this directlyPassage read and verified
- The IUCN Red List of Threatened Species — International Union for Conservation of Nature (Conservation authority)Relied on for: The Vulnerable assessment for Mycteroperca fusca, assessed 20 November 2016.States this directlyCitation checked — the work exists and is described correctly
- Tallas mínimas de captura — Canarias: minimum landing sizes and closed seasons — Gobierno de Canarias, Consejería de Agricultura, Ganadería y Pesca — Dirección General de Pesca, with the Grupo de Acción Costera de Tenerife and the Cabildo de Tenerife (Government fisheries body)Relied on for: That the Canary fisheries directorate regulates the recreational landing of this species and therefore treats it as quarry, and the Canarian common name it publishes beside the scientific name.States this directlyPassage read and verified
- Canary Islands regional angling guidance sites — Various Canary-based angling and island guidance publishers (Credible secondary source)Relied on for: Which species Canary shore anglers target from rock, mole and beach, with the techniques and baits the Spanish-language regional guidance describes.States this directlyCitation checked — the work exists and is described correctly
Why the 4 connections on this page are here, and the sources
Similar and related fish
Backed by research — 1 connection
Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.
Dusky grouper
Mycteroperca fusca is longer-bodied, reaches 80 cm and 3 kg, and is known with certainty only from four eastern Atlantic archipelagos; Epinephelus marginatus is deeper-bodied, heavier-headed and much larger, with a far wider range. The island grouper is assessed as Vulnerable and the dusky grouper's assessment is its own.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: The morphology, size, depth range and distribution that separate these two species from one another.States this directlyPassage read and verified
How it is caught
What experienced anglers do — 2 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.
Jigging
The Canary material describes jigging over rock and reef for the larger demersal predators, and the island grouper's usual band of 20 to 30 m is exactly the water that method covers.
- Canary Islands regional angling guidance sites — Various Canary-based angling and island guidance publishers (Credible secondary source)Relied on for: Canary shore angling practice: the techniques and tackle used from rock, mole and beach, and the species each is used for.States this directlyCitation checked — the work exists and is described correctly
- Guías de zonas de pesca en Canarias — Tenerife, Gran Canaria y Lanzarote — GuíaCanarias (Credible secondary source)Relied on for: The techniques named for Canarian fishing — rockfishing, jigging, light bottom fishing and squid jigs — and the species attached to them.States this directlyPassage read and verified
Shore diving
Groupers are a principal Canary spearfishing target and this species is among them. It is also assessed as Vulnerable, endemic to four archipelagos, low in resilience and site-faithful to particular caves — which is the combination that makes a diver able to take the same population repeatedly. The edge exists because the practice exists; the species record carries the rest of the sentence.
- Canary Islands regional angling guidance sites — Various Canary-based angling and island guidance publishers (Credible secondary source)Relied on for: Canary shore angling practice: the techniques and tackle used from rock, mole and beach, and the species each is used for.States this directlyCitation checked — the work exists and is described correctly
- Guías de zonas de pesca en Canarias — Tenerife, Gran Canaria y Lanzarote — GuíaCanarias (Credible secondary source)Relied on for: The techniques named for Canarian fishing — rockfishing, jigging, light bottom fishing and squid jigs — and the species attached to them.States this directlyPassage read and verified
Where it lives
Backed by research — 1 connection
Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.
Rocky shores and reefs
Recorded as demersal from 1 to 200 m and usually 20 to 30 m, restricted to four eastern Atlantic archipelagos. Its site fidelity to particular caves is the trait behind both its catchability and its Vulnerable assessment.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Environment, depth range, habitat association and distribution for Mycteroperca fusca.States this directlyPassage read and verified
How FishingHQ labels evidence is explained in the evidence policy.