The bullhead minnow (Pimephales vigilax) is a species of freshwater demersal fish,[3] native to the Mississippi River system in the United States, to tributaries of Lake Huron and Lake Michigan and to northern Mexico.

[6] The tail is forked with rounded ends,[7] with a dark spot present at the fin's base at the level of the lateral line.

[5] The single dorsal fin contains eight rays,[7] with a dark spot present anteriorly[5] and no spine.

It has also been introduced to Utah where it occurs in two closed drainages within the Great Basin, that of the Sevier River, where it seems to have been introduced accidentally in releases of channel catfish (Ictalurus punctatus) imported from Texas in the 1950s, and of Lake Utah.

For a mating location, the males build a nest, normally protected by rocks, tree roots or limbs, or boards, The female lays eggs on the underside of the nest's structural associate, and the male guards and oxygenates the eggs throughout spawning.