AKA barbels, these on a South American catfish can reach 4 feet in length & are covered with taste buds
These buds are especially concentrated on the fish's four pair of barbels (
whiskers) ... length (L, in cm) and weight (W, in kg) for nearly all species of fish 
can be... [DOC] [TLE] Catfishing Tips and Catfish Species | Discover Boating [PAR] Catfish have numerous external taste buds, many of which are located on the 
barbels.