The bullhead minnow is cylindrical and small in size, with an average length of 5.7 cm and a maximum length of 9.2 cm. The males of the species are dark in color, brown, olive, or tan, with two light colored vertical lines down their side, while the females are plain in comparison. The snout is rounded, and no teeth are present."Bullhead Minnow". Official Web site of Alabama Department of Conservation and Natural Resources, 2008 The tail is forked with rounded ends, the single dorsal fin contains eight rays and no spine, the anal fin contains seven rays with no spine, pelvic fins are abdominal and no adipose fin is present."Bullhead Minnow". University of Wisconsin Sea Grant Institute, 2013
