Atlantic halibut large flatfishes, including Pacific halibut, "Hippoglossus stenolepis". Due to its popularity as a food fish, Atlantic halibut has attracted investment in fish farming. As of 2006, five countries - Canada, Norway, the UK, Iceland and Chile - were engaged in some form of Atlantic halibut aquaculture production. In 1996, the IUCN rated it as Endangered and placed it on its Red List. The Atlantic halibut is a US National Marine Fisheries Service Species of Concern, one of those species about which the U.S. Government's National Oceanic and Atmospheric Administration has some concerns regarding status and threats, but for which insufficient
Fish anatomy and various processes which project from the centrum or arches. An arch extending from the top of the centrum is called a neural arch, while the hemal arch or chevron is found underneath the centrum in the caudal (tail) vertebrae of fish. The centrum of a fish is usually concave at each end (amphicoelous), which limits the motion of the fish. This can be contrasted with the centrum of a mammal, which is flat at each end (acoelous), shaped in a manner that can support and distribute compressive forces. The vertebrae of lobe-finned fishes consist of three discrete bony elements.