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.
Competition spearfishing
Explainer · Last reviewed 2026-08-10
Organised competition exists, has done since the 1950s, and is the most contested part of the sport — worth understanding whether or not you would ever enter one.
Safety
Shallow water blackout and breath-hold loss of consciousness — Can cause serious injury or death
A competitive format applies a time-based incentive to a discipline whose principal killer is extending a dive by a few seconds. The physiology is unchanged by the scoring, and hypoxic blackout gives no warning regardless of the reason a diver stayed down.
What reduces it: Dive the plan rather than the scoreboard. One up, one down with a surface buddy positioned to reach you — mandatory in most rulebooks and worth more than any of the others. Never hyperventilate. Withdraw after any blackout or loss of motor control, whatever it costs competitively, and treat that as the rule it is rather than a judgement call.
Worse when:
- Late in an event, when the clock is short and the score is close
- When fatigue has accumulated across several hours of diving
- In any format that rewards volume within a time limit
Fish welfare — Can cause injury needing treatment
Scoring by weight concentrates removal on the largest individuals in a defined area over a single day, and in protogynous species those are disproportionately the breeding males.
What reduces it: Minimum sizes with penalties, per-species caps, and formats that score variety rather than volume. Measure-and-release and photographic formats remove the problem rather than mitigating it, and several federations have moved that way.
Precautions that always apply here
- Never spearfish or freedive alone.
- Dive one up, one down: one diver down, one on the surface actively watching, every single dive.
- Never hyperventilate before a breath-hold. It delays the urge to breathe without adding oxygen, which is precisely the mechanism behind shallow water blackout.
- Tell somebody where you are going and when you expect to be back.
- Carry a charged phone in a waterproof case, or another means of calling for help.
Competition spearfishing is as old as the modern sport. Organised events began in the Mediterranean in the 1950s alongside the equipment that made the sport possible, and international championships have run in some form ever since, governed by the world underwater federation and its national member bodies.
The basic format is simple and has changed little. Competitors dive a defined zone for a fixed period, usually several hours, and are scored on the fish they bring in — typically by weight, with a minimum size below which a fish scores nothing and may incur a penalty, and often a points bonus per species to reward variety rather than volume. Some formats cap the number of any one species. Boats and handlers are permitted in some events and not others.
What makes it worth a page is not the format but the argument. Competition spearfishing is contested inside the sport as well as outside it, and the objections are substantive rather than squeamish: that a time-limited scoring incentive is exactly the wrong pressure to put on a diver's judgement, that concentrating many divers on one piece of ground for one day is a poor way to treat a reef, and that scoring by weight selects for the largest fish in a fishery where the largest fish are frequently the breeding stock.
The counter-arguments are also real, and this record states both.
The formats, in outline
Events are run to a set of broadly common conventions rather than one universal rulebook, and the details differ by federation and by country.
A COMPETITION ZONE is defined and competitors may dive anywhere within it. A TIME LIMIT applies, commonly in the region of five to six hours. SCORING is by weight of the fish presented, with a MINIMUM SIZE below which a fish scores nothing — and, in most rulebooks, incurs a penalty, precisely so that a diver who is unsure does not take the shot. A PER-SPECIES BONUS is common, awarding points for each different species presented, which is intended to reward reading the ground rather than finding one productive spot and emptying it. Many formats also CAP the number of individuals of any one species that can be scored.
SAFETY RULES are part of the governing framework rather than an addition to it: a surface buddy or handler, a marked float, and — in most rulebooks — mandatory withdrawal for anybody who has had a blackout or a loss of motor control, whatever the competitive consequence.
What FishingHQ deliberately does not publish is any account of how to score well. That would be performance advice in a discipline where the performance variable is time underwater, and it is the one thing this catalogue will not write.
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.
- AIDA International freediving education and safety standards — AIDA International (Water-safety or diver-training authority)Relied on for: That freediving and spearfishing are organised internationally with formal federations, rules and assessed standards.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: That buddy presence, surface marking and mandatory withdrawal after a hypoxic incident are standard components of organised diving safety frameworks.FishingHQ's interpretation of what it saysCitation checked — the work exists and is described correctly
The argument, on both sides
AGAINST. The most serious objection is about incentives. Every safety rule in this section of the catalogue reduces to the same instruction — surface on your plan, not on the fish — and a scoring system that rewards fish per hour applies steady pressure in exactly the opposite direction. Nobody claims competitors intend to dive dangerously; the point is that the incentive does not care what they intend.
The conservation objection is separate and equally substantive. Concentrating a large number of skilled divers on a defined piece of ground for a single day removes a great deal from a small area at once, and scoring by weight selects for the largest individuals — which, in the protogynous reef and rock species that competitions frequently target, are disproportionately the breeding males. That is the same argument this catalogue makes about selective harvest generally, sharpened by the fact that a competition does it deliberately and at scale.
FOR. Competitions are where safety rules are actually enforced. A recreational diver answers to nobody; a competitor dives under a rulebook with mandatory buddies, mandatory floats and mandatory withdrawal after an incident, and organised events have driven the adoption of those practices across the wider sport. Minimum sizes with penalties and per-species scoring are genuine attempts to design the conservation problem out, and they are more than most recreational fishing applies to itself.
Several national federations have moved toward measure-and-release formats, photographic scoring, or events targeting invasive species rather than native ones. Whether those changes go far enough is the live question, and FishingHQ does not claim to answer it.
Disputed
Credible sources disagree. FishingHQ records the disagreement rather than picking a side it cannot justify.
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: That extending a breath-hold beyond plan is a principal contributor to hypoxic blackout, which is the mechanism the incentive objection rests on.States this directlyPassage read and verified
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: That protogynous hermaphroditism is widespread among wrasse, groupers and other reef-associated genera, such that the largest individuals are disproportionately male.States this directlyPassage read and verified
- Good Fish Guide — Marine Conservation Society (Conservation authority)Relied on for: That size-selective removal and the concentration of effort are components of fishery sustainability assessment.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
A claim about how the discipline is organised and about the safety framework competition imposes, held above practitioner level because the safety component is the substantive part.
- AIDA International freediving education and safety standards — AIDA International (Water-safety or diver-training authority)Relied on for: That freediving and spearfishing are organised internationally with formal governing bodies, rules and assessed standards.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 extending a breath-hold beyond plan is a principal contributor to hypoxic blackout, which is the mechanism behind the objection to time-limited scoring.States this directlyPassage read and verified
Related reading
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.
Loss of motor control, and what it is warning of
The setting in which the framing is most dangerous.
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: Hypoxic symptoms in breath-hold diving and their relationship to blackout.States this directlyPassage read and verified
Safety reading
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.
Breath-hold blackout
A direct safety claim about the incentive structure, sourced to diving medicine.
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: Hypoxic blackout physiology, that it gives no warning, and the risk factors that increase it.States this directlyPassage read and verified
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Buddy protocol and mandatory withdrawal after a hypoxic incident as standard practice.FishingHQ's interpretation of what it saysCitation checked — the work exists and is described correctly
Environment and conservation
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.
Selectivity and what it is used for
A conservation claim resting on documented reproductive biology rather than on objection, which is why it is held to a scientific standard.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: That protogynous hermaphroditism is widespread among wrasse, groupers and other reef-associated genera, such that the largest individuals in a population are disproportionately male.States this directlyPassage read and verified
- Good Fish Guide — Marine Conservation Society (Conservation authority)Relied on for: That size-selective removal and the concentration of fishing effort are components of sustainability assessment.States this directlyCitation 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
- AIDA International freediving education and safety standards — AIDA International (Water-safety or diver-training authority)Relied on for: That freediving and spearfishing are organised internationally with formal governing bodies, rules and assessed standards.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: Hypoxic blackout physiology and the risk factors that increase it.States this directlyPassage read and verified
How FishingHQ labels evidence is explained in the evidence policy.