Small, fleshy, worm-like appendage located near the mouth of certain fish. Sensory in nature, may aid in food location. Bycatch The harvest of fish or shellfish other than the species for which the fishing gear was used. Examples are blue crabs caught in shrimp trawls or sharks caught on a tuna line. Bycatch is also often called incidental catch. Some bycatch is kept for sale.
A barbel on a fish (or turtle) is a slender, whiskerlike tactile organ near the mouth. Fish that have barbels include the catfish, the carp, the goatfish, Sturgeon, and some species of shark. They house the taste buds of such fish and are used to search for food in murky water.