- bullhead - freshwater sculpin with a large flattened bony-plated head with hornlike spines
--1 is a kind of sculpin
--1 is a member of Cottus, genus Cottus- bullhead - any of several common freshwater catfishes of the United States
--2 is a kind of catfish, siluriform fish
--2 is a member of Ameiurus, genus Ameiurus
--2 has particulars:horned pout, hornpout, pout, Ameiurus Melas; brown bullhead - bullhead - any of several common freshwater catfishes of the United States