Fish
Lingcod
Ophiodon elongatus · also called lingcods
A lingcod is not actually a cod at all, just a large, aggressive Pacific predator that happened to earn a misleading name. Some individuals carry a genuinely startling secret beneath the skin too, flesh tinted blue-green by a completely harmless natural pigment that fades away the moment the fish hits the pan.
Overview
The lingcod, Ophiodon elongatus, is a large predatory fish of rocky reefs and kelp forests along the Pacific coast of North America, from Alaska to Baja California. A large, tooth-filled mouth lets it tackle prey close to its own size, ambushing fish, squid, and octopus from cover.
A misleading name, a devoted father
Some individuals carry harmless blue-green flesh from a natural bile pigment called biliverdin. After spawning, the male alone guards the egg mass aggressively until it hatches, genuine paternal care rare among fish.
Status
Least Concern — recovering well in previously overfished areas thanks to improved size and catch limits along the Pacific coast.
Lingcod: common questions
Is a lingcod actually a type of cod?
No, despite the name, the lingcod is not a true cod and belongs to an entirely different fish family, more closely related to greenlings than to actual cod species, with the common name likely originating from a general resemblance in overall body shape and size to true cod rather than any real taxonomic relationship between the two.
Why does some lingcod flesh turn blue-green?
A proportion of lingcod individuals naturally produce a harmless bile pigment called biliverdin within their flesh, giving raw fillets from these fish a distinctly blue-green tint that can look alarming or unappetising at first glance, though the colour is completely harmless and fades to a normal white appearance once the fish is properly cooked.
Do lingcod parents look after their eggs?
Yes, after a female lays her eggs in a rocky nest site, the male lingcod takes on sole responsibility for guarding the resulting egg mass, aggressively defending it against potential egg predators until the eggs hatch, a genuine example of dedicated paternal care that is relatively uncommon among fish species generally.
Has lingcod fishing always been sustainable?
No, lingcod populations in parts of the Pacific coast experienced significant declines from historical overfishing, which prompted the introduction of stricter fishery management measures including size and catch limits in various regions, and under this improved management, several previously depleted lingcod stocks have shown meaningful recovery, supporting the species' current Least Concern status.