Lingcod

A large ambush predator that sits on rocky reef and kelp ground in cold Pacific water, and the methods are shaped by a fish that does not chase far but attacks anything close.

JIGGING is the primary method because the fish holds tight to structure at depth and a heavy jig worked vertically reaches it — and because lingcod strike hard at anything that looks like an injured fish passing their position.

SPEARFISHING and DIVING are significant, for the usual structure-fish reasons: the fish holds, is approachable, and can be selected by size.

AND ONE BEHAVIOUR WORTH KNOWING. Lingcod frequently seize a hooked smaller fish and hold on all the way to the surface without being hooked themselves, which is a well-known feature of the fishery and a genuine illustration of how aggressively they take.

THE MANAGEMENT NOTE. Nest-guarding males are vulnerable to divers and anglers during the spawning period, and closures exist in places for that reason. Check the current position locally.

Lingcod give an angler two entirely separate problems and it is easy to prepare for only one.

THE MOUTH. This is a large-headed ambush predator with a mouth full of long, inward-curving canines set in powerful jaws, and it does not stop being a predator on the deck. The characteristic injury is a hand introduced to the mouth to retrieve a jig and withdrawn across teeth angled to prevent exactly that. The teeth are not serrated and do not slice; they puncture deeply and hold, which is worse. Long pliers, always. A lingcod's head should be controlled with a gripper or a gloved hold behind the gill covers before anything approaches its mouth.

AND THE JAW IS STRONG ENOUGH TO MATTER. This is not a fish that can be jaw-gripped by hand in the way a bass can.

THE DEPTH. Lingcod are taken from rocky ground at depths where barotrauma is common, and they suffer it in the ordinary way — distension, buoyancy, inability to descend. A fish over or under the slot has to be recompressed with a descending device to have a realistic chance, and in several jurisdictions carrying that equipment is required.

ONE ODDITY WORTH KNOWING. A hooked lingcod will frequently arrive with another fish clamped in its jaws that it refused to let go of on the way up. That second fish is not hooked and is usually a rockfish with its own barotrauma. It is easy to let it drift off at the surface without thinking; it needs descending too.

AND THE FLESH IS SOMETIMES BLUE-GREEN. It is a harmless pigment, it cooks out white, and it alarms people unnecessarily.

Lingcod split the reproductive labour completely between the sexes, and the split is what creates the fishery's central problem.

THE FEMALE DOES THE INVESTMENT AND DEPARTS. She deposits a large, dense, adhesive egg mass — a conspicuous white or pinkish block, sometimes the size of a football — wedged into a crevice on rocky ground in strong current. The site selection is deliberate: high flow keeps the mass oxygenated and keeps silt off it. Having laid, she leaves entirely.

THE MALE STAYS FOR THE WHOLE INCUBATION, and it is a long one — the eggs develop over a period of weeks in cold winter water. He guards the mass against the animals that eat it, which in that habitat means rockfish, greenling, sculpins, starfish and crabs. Egg masses are highly nutritious, entirely stationary and well known to every predator on the reef, and an unguarded one is consumed quickly.

WHICH MAKES THE GUARDING MALE THE MOST CATCHABLE FISH ON THE GROUND AT THE WORST POSSIBLE MOMENT. He is stationary, he is on a known and identifiable site, he is aggressive toward anything approaching, and a lure dropped near the nest is attacked as an intruder. Nothing about a lingcod's ordinary caution applies. He is also, at that point, load-bearing for an entire clutch: nest abandonment following capture is documented, and a mass that loses its guard is eaten rather than merely at risk.

SO THE ARITHMETIC IS STARK. A winter lingcod taken from a nest is not one fish; it is one fish plus a clutch representing a female's entire reproductive output for the season. That is a biological statement about consequences, and it is the reasoning behind winter closures where they exist — instruments whose dates, waters and terms are current, local, and not stated here.

AND THE FISH IS OTHERWISE A DEEP AMBUSH PREDATOR, taken from rock, meaning most nesting-season captures also involve barotrauma — so a release intended to undo the mistake may not work either.