A fleshy filament growing from the mouth or snout of certain fish, such as catfish, used for sensing the environment.
The catfish used its barbel to detect food in the murky water.
A European freshwater fish (Barbus barbus) of the carp family, noted for the four barbels around its mouth; by extension, any closely related fish of the genus Barbus.
The record-breaking angler proudly displayed the huge barbel he had just landed.
