Bony Fishes - Fish that have a bony skeleton and belong to the class Osteichthyes. Basically, this is all fish except for sharks, rays, skates, hagfish and lampreys. Bycatch - The harvest of fish or shellfish other than the species for which the fishing gear was set. Examples are blue crabs caught in the shrimp trawls or sharks caught on a tuna longline. Bycatch is also often called incidental catch.
Some bycatch is kept for sale.
CPUE - See catch per unit of effort. Catadromous - Fish that migrate from fresh water to saltwater to spawn. The total number or poundage of fish captured from an area over some period of time. This includes fish that are caught but released or discarded instead of being landed. The catch may take place in an area different from where the fish are landed.