Atlantic halibut 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 among the largest teleost (bony) fish in the world, and is an endangered species due to a slow rate of growth and previous overfishing. Halibut are strong swimmers and are able to migrate long distances. Halibut size is not age-specific, but rather tends to follow a cycle related to halibut (and therefore food) abundance. The native habitat of the Atlantic halibut is the temperate and
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,