Fish
Sablefish
Anoplopoma fimbria · also called black cod, butterfish
A sablefish is sold in restaurants and markets as black cod, even though it isn’t a cod at all and shares no close relationship with one. What it does share with a really good piece of butter is texture, thanks to an unusually high fat content that comes from a life spent in the cold, dark water several hundred metres down along the North Pacific continental shelf.
Overview
The sablefish, Anoplopoma fimbria, is a long-lived, deep, cold-water predator of the North Pacific, hunted commercially off Alaska, Canada, and the northwestern United States. It preys on smaller fish, squid, and crustaceans at significant depth.
Rich flesh, careful management
Its notably high fat content gives cooked sablefish a rich, buttery texture prized in many cuisines, especially smoked or with a miso marinade. Because the species is slow to mature and long-lived, science-based catch quotas have been central to keeping North Pacific sablefish fisheries sustainable.
Status
Least Concern — generally well managed, with careful catch limits helping maintain stable populations despite the species’ slow growth and late maturity.
Sablefish: common questions
Is black cod actually a type of cod?
No, black cod is simply a common market name for the sablefish, which belongs to an entirely different fish family from true cod and has no close taxonomic relationship to it, with the name likely originating from the fish's dark colouration and its market positioning as a comparable food fish rather than reflecting any actual biological connection between the two.
Why is sablefish so highly regarded by chefs and food lovers?
Sablefish flesh contains an unusually high proportion of fat compared with many other commercially available fish, which gives the cooked flesh a notably rich, buttery, tender texture and flavour that many chefs and diners find especially appealing, a quality that has made sablefish, particularly when smoked or prepared with a traditional miso-based marinade, a genuinely prized ingredient in various culinary traditions.
How deep in the ocean does a sablefish actually live?
Adult sablefish are typically found at significant depths, often several hundred metres or considerably more, along the continental shelf and slope in cold water, with juveniles generally found somewhat shallower before moving into deeper adult habitat as they mature, making the species a genuine deep-water resident for most of its life.
Why does sablefish require such careful fishery management?
The species is long-lived and slow to reach reproductive maturity, meaning a population significantly reduced by overfishing would take a considerable time to recover through natural reproduction alone, so science-based catch quotas and ongoing population monitoring have been put in place in the well-managed North Pacific sablefish fishery specifically to prevent this kind of slow-to-reverse overfishing situation from developing.