Large image Description Ameiurus means primitive or curtailed in reference to the notch in the distal end of the caudal fin, and natalis is Latin for having large buttocks .
Yellow bullheads are typically light yellow to olive-green on the back, often somewhat mottled.
The belly is yellowish to white. The tail is not notched, and may be slightly rounded. Chin barbels are white. The anal fin has 23-27 rays. Biology During late spring or early summer yellow bullheads excavate nests in mud bottoms and spawn.