Before you spearfish — this comes first
- Get proper instruction before you spearfish. A recognised freediving or spearfishing course teaches the things that actually kill people in this sport, and reading about them is not the same as being taught them.
- Dive with a buddy, and dive one up, one down — one diver in the water, one on the surface watching them, every dive. A breath-hold blackout is silent and gives no warning; a watching buddy is the difference between an incident and a fatality.
- Stay inside your own training and experience. Depth and breath-hold times are personal, they change day to day, and nobody else's numbers apply to you.
- Understand the conditions before you enter the water: visibility, current, swell, tide, boat traffic and your exit. Conditions decide whether a dive is reasonable far more often than skill does.
- Use equipment you have been shown how to use, check it before every session, and be visible — a marked float and line are how boat traffic knows you are there.
- Never extend a dive for a fish. No catch is worth pushing a breath-hold, and the urge to take one more second is exactly what a blackout feels like from the inside — which is to say, like nothing at all.
Catch handling and dispatch in spearfishing
Explainer · Last reviewed 2026-08-10
A speared fish should be dispatched immediately rather than carried alive, which is both the welfare position and the reason spearfished fish can be exceptional on the table.
Safety
Encounters with marine life — Can cause injury needing treatment
Struggling fish and blood attached to a diver attract sharks and other predators to the diver rather than to the catch.
What reduces it: Dispatch fish immediately and transfer them to a float kept at a distance rather than carrying them on the body.
Fish welfare — Can cause injury needing treatment
Fish left alive on a stringer or in a catch bag die slowly and in distress, and the flesh quality degrades with them.
What reduces it: Spike and bleed immediately after securing the fish, then cool it.
A spearfisher has an advantage over almost every other fishing method: the fish is reached within seconds and can be dispatched at once. Taking that advantage is both a welfare obligation and the reason spearfished fish have a reputation for quality.
The practice is to secure the fish, dispatch it immediately by spiking the brain, and bleed it. Fish left struggling on a stringer or in a catch bag die slowly, and a fish that dies slowly in warm water is measurably worse to eat as well as being a welfare failure.
There is a safety dimension too, and it is not minor. A struggling fish on a stringer attached to a diver is an active attractant to sharks and other predators, and blood in the water changes the situation the diver is in.
Dispatch and quality
Immediate brain spiking — the technique widely known by its Japanese name, ikejime — stops the fish instantly and prevents the muscle activity that degrades flesh quality. Bleeding immediately afterwards removes blood that would otherwise remain in the muscle.
The practical effect on eating quality is substantial and well recognised, which is a rare case where the welfare-optimal action and the culinary-optimal action are identical.
Cooling follows: a dispatched, bled fish deteriorates fast in a warm boat or on a hot rock, and getting it into a cool box or an ice slurry preserves what the dispatch achieved.
What this page does not do is teach the technique in detail, because spike placement varies by species and doing it badly is worse than not attempting it. It is a skill worth learning properly from somebody who has it.
Practitioner consensus
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.
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated practitioner accounts of immediate dispatch, bleeding and cooling of speared fish.States this directlyCitation checked — the work exists and is described correctly
- Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Practitioner treatment of fish handling and quality after capture.States this directlyCitation checked — the work exists and is described correctly
Carrying the catch, and why it matters for safety
A stringer trailing struggling fish from a diver's belt is a poor arrangement on every count. It attracts predators, it can entangle, and it keeps fish alive in distress.
The common alternative is to keep the catch on the float rather than on the diver, at a distance, so that anything attracted to it is not attracted to the person. In waters with a meaningful shark presence this is standard practice rather than a refinement.
The general principle is that fish are dispatched and moved away from the diver promptly. That single habit addresses welfare, quality and one of the discipline's genuine predator risks at the same time.
Practitioner consensus
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.
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Practitioner accounts of keeping catch on the float rather than on the diver in waters with predator presence.States this directlyCitation checked — the work exists and is described correctly
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Diving guidance on avoiding attractants and managing equipment carried by a diver.FishingHQ's interpretation of what it saysCitation checked — the work exists and is described correctly
Where to go next
Where it matters
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.
Spearfishing
A membership assertion rather than a topical one: this record teaches the discipline or its equipment, so the discipline's mandatory safety posture applies to it.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing as a defined discipline with its own technical, equipment and safety standards, set out by the international underwater federation.States this directlyCitation checked — the work exists and is described correctly
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: That the safety requirements of breath-hold diving apply across the discipline rather than to particular equipment or techniques within it.States this directlyPassage read and verified
Immediate dispatch is available to spearfishers in a way it is not to anglers.
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: Diver safety guidance underlying this connection. Immediate dispatch is available to spearfishers in a way it is not to anglers.States this directlyPassage read and verified
Gear this affects
What these connections rest on (1)
Practitioner consensus — 1 connection
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.
Catch handling and transport
Dispatch and cooling are described together in spearfishing practice because the second follows immediately from the first.
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Diving body guidance on handling catch in the water.Background and mechanism onlyCitation checked — the work exists and is described correctly
- Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Practitioner accounts of dispatch and cooling.States this directlyCitation checked — the work exists and is described correctly
Related reading
- A fish that comes off, and what you owe itA fish that is recovered is dispatched immediately; the record that follows is where the obligation stops.
- Controlling a fish after the shotDispatch follows control, and a fish that has not been controlled cannot be dispatched promptly.
- How histamine forms in a fish, and why the enzyme is the problemSpearfishing takes the susceptible species — tunas, amberjacks, bonito — in warm water, and holds them on a stringer in the warmest layer of it. The mechanism record explains why that is worse than it looks.
- Keeping a catch cool and safe to eatImmediate dispatch and prompt bleeding are the first two steps of keeping a fish safe as well as the welfare position.
- Lookalike species, and why uncertainty means do not shootThere is no release in this discipline, which is why the identification standard sits before the shot rather than after it.
What these connections rest on (5)
Practitioner consensus — 1 connection
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.
A fish that comes off, and what you owe it
One record resolves a question the other raises and cannot answer alone.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing as a defined discipline with its own technical, equipment and safety standards, set out by the international underwater federation.States this directlyCitation checked — the work exists and is described correctly
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: That the safety requirements of breath-hold diving apply across the discipline rather than to particular equipment or techniques within it.States this directlyPassage read and verified
Authoritative guidance — 4 connections
Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.
Controlling a fish after the shot
The two halves of what happens between the shot and the float.
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Diving safety guidance on planning, conditions assessment, buddy protocol, entanglement and equipment handling.States this directlyCitation checked — the work exists and is described correctly
How histamine forms in a fish, and why the enzyme is the problem
A link from a vertical's own catch-handling record to the mechanism that governs the hazard it is managing.
- Fish and Fishery Products Hazards and Controls Guidance — US Food and Drug Administration, Center for Food Safety and Applied Nutrition, 2022 (Standards body)Relied on for: Hazards and controls for fish and fishery products: scombrotoxin formation and the species groups associated with it, seafood parasites, and natural toxins.States this directlyPassage read and verified
Keeping a catch cool and safe to eat
Where catch handling and food safety turn out to be the same instruction.
- Fish and Fishery Products Hazards and Controls Guidance — US Food and Drug Administration, Center for Food Safety and Applied Nutrition, 2022 (Standards body)Relied on for: Histamine formation in scombroid and related species, its temperature dependence, its survival of cooking, and rapid chilling as the control.States this directlyPassage read and verified
Lookalike species, and why uncertainty means do not shoot
The irreversibility that gives the identification rule its force.
- 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 by ranked diagnostic characters, and the limits of identification from general appearance.States this directlyCitation checked — the work exists and is described correctly
How this compares
- Floppers, slip tips, and holding a fishA fish that tears off is an animal killed and not taken, which is the worst outcome in the discipline.
- Stringers, catch bags, and keeping fish away from youDispatching a fish promptly reduces both the distress signal and the spoilage.
What these connections rest on (2)
Authoritative guidance — 2 connections
Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.
Floppers, slip tips, and holding a fish
Connects tip selection to the welfare obligation.
- FAO fishing gear types and fishing technology information — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Spear tip and harpoon head construction across fishing gear types.States this directlyCitation checked — the work exists and is described correctly
Stringers, catch bags, and keeping fish away from you
Handling and carriage are one sequence.
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Diving safety and equipment guidance on managing catch in the water.States this directlyCitation checked — the work exists and is described correctly
Safety reading
- Handling fish safelyDispatch and handling are the same subject approached from two disciplines.
- Sharks and spearfishingStruggling fish on a diver is the arrangement that attracts predators.
What these connections rest on (2)
Authoritative guidance — 2 connections
Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.
Handling fish safely
Dispatch and handling are the same subject approached from two disciplines.
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: Diver safety guidance underlying this connection. Dispatch and handling are the same subject approached from two disciplines.States this directlyPassage read and verified
Sharks and spearfishing
Struggling fish on a diver is the arrangement that attracts predators.
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: Diver safety guidance underlying this connection. Struggling fish on a diver is the arrangement that attracts predators.States this directlyPassage read and verified
Sources for this page
- General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Practitioner accounts of dispatch, bleeding and catch carriage in spearfishing.States this directlyCitation checked — the work exists and is described correctly
How FishingHQ labels evidence is explained in the evidence policy.