Atlantic halibut information is available to indicate a need to list the species under the U.S. Endangered Species Act (ESA). The American Fisheries Society has classified the species as "Vulnerable". In 2010, Greenpeace International added the Atlantic halibut to its seafood red list of "fish that are commonly sold in supermarkets around the world, and which have a very high risk of being sourced from unsustainable fisheries." Atlantic halibut The Atlantic halibut ("Hippoglossus hippoglossus") is a flatfish of the family Pleuronectidae. They are demersal fish living on or near sand, gravel or clay bottoms at depths of between . The halibut is
Fourhorn poacher more commonly reach a TL of . The maximum recorded weight is , and the maximum recorded age is 7 years. The fourhorn poacher is preyed on by "Hippoglossus stenolepis". Its own diet consists of crustaceans including shrimp, crabs, isopods, amphipods, and ostracods, as well as bony fish, gastropods, and polychaetes. Fourhorn poacher The fourhorn poacher ("Hypsagonus quadricornis", also known as the four-horned sea-poacher) is a fish in the family Agonidae (poachers). It was described by Achille Valenciennes in 1829, originally under the genus "Aspidophorus". It is a marine, temperate water-dwelling fish which is known from the northern Pacific Ocean,