Benthic - Refers to animals and fish that live on or in the water bottom. Billfishes - The family of fish that includes marlins, sailfish and spearfish. 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.