High Quality Content by WIKIPEDIA articles! The yellow bullhead, (Ameiurus natalis) is a species of bullhead catfish. Yellow bullhead are typically yellow-olive to slatey-black on the back and sometimes mottled depending on habitat. The sides are lighter and more yellowish while the underside of the head and body are bright yellow, yellow white, or bright white. The rear edge of its caudal fin may be rounded or nearly straight. The yellow bullhead is distinguished from the brown bullhead and black bullhead by its white barbels.