Speargun reels
Tackle · Last reviewed 2026-08-10
A drum of line on the gun that lets a fish run instead of towing the diver — the middle option between a fixed line and a full breakaway rig.
Safety
Entanglement — Can cause serious injury or death
A reel keeps the diver connected to a running fish. Loose line coming off a reel under load can loop around a hand, an arm or the gun, and a jam turns a yielding connection into a fixed one at the moment a fish is pulling hardest.
What reduces it: Keep the line tidy and the reel serviced. Set the drag so it yields. Carry a cutting tool reachable with either hand. Be willing to let go of the gun entirely — it is replaceable and the float will usually recover it. For fish large enough to tow you, use a breakaway rig and floats instead, which takes the diver out of the system rather than cushioning them inside it.
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.
A reel bolted to a speargun does two things a fixed line cannot. It lets a fish take line under drag rather than pulling on the diver, and it lets the diver surface while still connected to the fish.
That second point is the one that matters and is rarely stated first. On a fixed line, a diver who has shot a fish that will not come is choosing between staying down and letting go. On a reel, they can go up, breathe, and deal with the fish from the surface — which removes the single commonest reason divers extend a breath-hold past sense.
Compared with a full breakaway rig it is less capable and much more convenient. A breakaway transfers the fish to floats and takes the diver out of the system entirely, which is what large pelagic fish require; a reel keeps the diver in the system with a drag between them and the fish, which is fine for reef and rock fish and is not fine for something that can tow a buoy.
The cost is a mechanism. A reel can jam, the line can bird's-nest under a fast run, and the drag can be set wrongly — none of which a length of line attached to a gun can do. It is a real trade, and which way it goes depends almost entirely on the size of fish being engaged.
- Category
- Spearfishing equipment
What it does
Holds a reserve of line on the gun and releases it under an adjustable drag when a fish pulls. It converts a fixed connection into a yielding one, so that a fish can run without towing the diver and the diver can surface without disconnecting.
How to choose one
- Reel for reef and rock fish you can control. Breakaway and floats for anything that could tow you.
- Carry enough line for the depth being dived plus a genuine working margin — running out mid-run loses the fish and frequently the shaft.
- Set the drag before the dive, not during a run. It should yield before anything else in the system breaks.
- A reel is a mechanism in salt water: it needs rinsing and servicing or it will jam at the worst moment.
- Keep the line on the reel tidy. A loose loop is both a jam and an entanglement.
What the numbers mean
CAPACITY is quoted in metres of a stated line diameter, and should comfortably exceed the depth being dived. LINE is usually Dyneema for thin diameter and low stretch, or monofilament for abrasion resistance and a little cushioning. DRAG may be a simple friction adjustment or a proper clutch; what matters is that it is smooth and repeatable rather than strong. MOUNTING — side or bottom — changes how the line leaves the gun and whether it fouls the muzzle. LINE-RELEASE ARRANGEMENT determines whether the line runs cleanly on the shot or snags on the gun, which is where most reel problems actually begin.
Care, and how it fails
Salt is the enemy: rinse thoroughly after every session, and service the mechanism periodically rather than when it stops. Check the line along its whole length for abrasion, because it is chafed by rock, coral and the shaft notch and it parts under exactly the load it exists for. Re-spool it evenly; line laid on badly jams under a fast run. The failure that matters is a jam mid-run with a diver connected to a moving fish, so a reel that has become stiff is a reel to service before diving, not after.
Reel or breakaway: what you are actually choosing between
Both answers solve the same problem — a shot fish has to be attached to something that yields — and they fail in opposite directions.
A REEL KEEPS EVERYTHING ON THE GUN. Nothing trails, nothing is dragged through kelp, nothing snags on a boat, and a diver can move through confined ground and between holes without managing a float line. That is why reels dominate in ground that is broken, weedy or tight, and why they suit shore diving where the swim out and back is long.
ITS FAILURE MODE IS THAT THE DIVER IS ATTACHED TO THE FISH. If the fish is bigger than expected, or reaches structure, the diver is holding the gun that is holding it. The answer is to let go of the gun — which only works if the gun floats or is attached to something that does, and which is a decision a diver has to have made before it happens rather than during it.
A BREAKAWAY PUTS THE FISH ON THE FLOAT INSTEAD. The shooting line detaches from the gun at the shot and the fish fights a buoy at the surface, which is the only arrangement that reliably works on fish large enough to tow a person. The float also marks the diver's position for boat traffic, which is a second and independent reason for it.
ITS FAILURE MODE IS LINE IN THE WATER. A float line is a rope through the water column with a diver at one end, and it is the specific thing that entangles people. It also snags on structure, catches on boats and demands management every dive.
SO THE HONEST RULE IS ABOUT QUARRY SIZE AND GROUND, not preference. Small fish in tight ground: reel. Fish that can run, or open water, or any traffic: float and breakaway. Many divers carry both and rig for the day.
AND WHATEVER IS CHOSEN, THE KNIFE IS NOT OPTIONAL. Every one of these systems puts line in the water near a person who cannot breathe, and a cutting tool reachable with either hand is the mitigation for all of them.
Authoritative guidance
Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing practice, equipment convention and the safety expectations set out by the international underwater federation.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: Spearfishing equipment and practice: gun and rigging choice, shot placement, and the handling of a shot fish, from a practitioner tradition distinct from the European one.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: Freediving safety guidance including the buddy system, weighting, positive buoyancy at the surface and the management of equipment failure.States this directlyPassage read and verified
Where to go next
Where it is used
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.
Shore diving
A dependency between a format and the rigging that suits it.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing practice, equipment convention and the safety expectations set out by the international underwater federation.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: Spearfishing equipment and practice: gun, shaft, tip and rigging choice, and the handling of a shot fish, from a practitioner tradition distinct from the European one.States this directlyCitation checked — the work exists and is described correctly
What it works with
- SpeargunsA reel is mounted on the gun and its line runs to the shaft, so gun choice and reel choice are the same decision. Letting go of the gun is the emergency action a reel rig depends on, which only works if the gun floats or is attached to something that does.
- Shafts and tipsTip choice and rigging are one decision. A flopper on a fish that runs tears out; a slip tip spreads the load — and both assume the fish is attached to something that yields, which is the reel or the breakaway.
- Speargun power systemsA reel lets a fish run under drag and — the part that matters — lets the diver surface while still connected, which removes the commonest reason a breath-hold gets extended past sense.
What these connections rest on (3)
Practitioner consensus — 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.
Spearguns
A dependency between equipment, recorded because choosing one of these constrains the other. Convention, recorded as convention.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing practice, equipment convention and the safety expectations set out by the international underwater federation.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: Spearfishing equipment and practice: gun, shaft, tip and rigging choice, and the handling of a shot fish, from a practitioner tradition distinct from the European one.States this directlyCitation checked — the work exists and is described correctly
Shafts and tips
A dependency between equipment, recorded because choosing one of these constrains the other. Convention, recorded as convention.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing practice, equipment convention and the safety expectations set out by the international underwater federation.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: Spearfishing equipment and practice: gun, shaft, tip and rigging choice, and the handling of a shot fish, from a practitioner tradition distinct from the European one.States this directlyCitation checked — the work exists and is described correctly
Authoritative guidance — 2 connections
Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.
Spearguns
Diving body guidance on line management and entanglement risk in the water.
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Guidance on lines and entanglement hazards for divers.States this directlyCitation checked — the work exists and is described correctly
Speargun power systems
An equipment claim whose justification is a safety mechanism rather than a fishing advantage, which is why it is not labelled as practitioner preference.
- 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 to deal with a fish is a principal contributor to hypoxic blackout.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: Entanglement as a recognised hazard and the equipment practice addressing it.FishingHQ's interpretation of what it saysCitation checked — the work exists and is described correctly
Understanding it
- Line and float-line tanglesReel line paying out around structure while following a fish is the interaction behind most entanglement incidents.
- Reel jams, clips and the rigging that fails quietlyThe reel record explains what a reel is for; the failure record explains what it does when it jams with line out.
What these connections rest on (2)
Authoritative guidance — 1 connection
Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.
Line and float-line tangles
The architecture most associated with the hazard.
- 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 entanglement hazards, line management and emergency cutting equipment.States this directlyCitation checked — the work exists and is described correctly
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.
Reel jams, clips and the rigging that fails quietly
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
Instead of this
- Reels, float lines and breakaway systemsThree ways of staying connected to a fish, separated by what happens when something goes wrong.
- Shooting line: monofilament or DyneemaWhat the line between shaft and gun is made of, which changes how it handles, how it tangles and how it fails.
- Dive floats and float linesThe two answers to the same problem — a shot fish has to be attached to something that yields — and they fail in opposite directions. A reel keeps everything on the gun and attaches the DIVER to the fish; a float takes the fight and puts a rope in the water column.
- Shooting line and breakaway riggingThe choice is about what the fish is attached to. A reel keeps the diver in the system with a drag between them; a breakaway takes the diver out of it entirely. Anything that could tow you needs the second.
What these connections rest on (4)
Authoritative guidance — 3 connections
Stated by a fisheries authority, scientific institute or recognised angling body. Authoritative, but summarising rather than demonstrating.
Reels, float lines and breakaway systems
The component record and the architectural decision around it.
- 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 surface marking, dive flags and diver visibility.States this directlyCitation checked — the work exists and is described correctly
Shooting line: monofilament or Dyneema
Line choice interacts with the connection architecture.
- FAO fishing gear types and fishing technology information — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Line construction and material properties, including monofilament and high-modulus braided line.States this directlyCitation checked — the work exists and is described correctly
Shooting line and breakaway rigging
A safety-consequential equipment comparison: choosing wrongly means being connected to a fish capable of pulling a person down on a breath-hold.
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Entanglement as a recognised diving hazard and the equipment practice that addresses it.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 a breath-hold emergency is time-limited from the moment it begins, so a diver attached to a running fish has no margin to resolve it.FishingHQ's interpretation of what it saysPassage read and verified
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.
Reels, float lines and breakaway systems
An explainer carrying a mechanism the equipment record depends on.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing practice, equipment convention and the safety expectations set out by the international underwater federation.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: Spearfishing equipment and practice: gun, shaft, tip and rigging choice, and the handling of a shot fish, from a practitioner tradition distinct from the European one.States this directlyCitation checked — the work exists and is described correctly
Shooting line: monofilament or Dyneema
An explainer carrying a mechanism the equipment record depends on.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing practice, equipment convention and the safety expectations set out by the international underwater federation.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: Spearfishing equipment and practice: gun, shaft, tip and rigging choice, and the handling of a shot fish, from a practitioner tradition distinct from the European one.States this directlyCitation checked — the work exists and is described correctly
Dive floats and float lines
A comparison a diver is genuinely choosing between, joining two records that resolve one another.
- CMAS technical and sporting standards for underwater activities — Confédération Mondiale des Activités Subaquatiques (Standards body)Relied on for: Breath-hold spearfishing practice, equipment convention and the safety expectations set out by the international underwater federation.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: Spearfishing equipment and practice: gun, shaft, tip and rigging choice, and the handling of a shot fish, from a practitioner tradition distinct from the European one.States this directlyCitation checked — the work exists and is described correctly
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.
Entanglement while breath-hold diving
Diving and freediving body guidance on entanglement hazards.
- DAN guidance on freediving safety, hypoxia and shallow-water blackout — Divers Alert Network (Water-safety or diver-training authority)Relied on for: Guidance on hazards to a breath-hold diver, including entanglement.States this directlyPassage read and verified
Sources for this page
- BSAC diving safety guidance and annual incident report — British Sub-Aqua Club (Water-safety or diver-training authority)Relied on for: Entanglement as a recognised diving hazard and the equipment practice that addresses it.FishingHQ's interpretation of what it saysCitation 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 to deal with a fish is a principal contributor to hypoxic blackout — the problem a reel exists to remove.States this directlyPassage read and verified
How FishingHQ labels evidence is explained in the evidence policy.