A brown bullhead catfish caught in the Anacostia River in Bladensburg, Md., exhibits a skin tumor on May 18, 2016. Researchers from USFWS study the incidence of skin and liver tumors in the fish...The bullhead or "horned pout" is one of the many freshwater catfish in North America belonging to the genus Ameiurus, the family Ictaluridae. They differ from other North American catfish because they have squared tails instead of forked ones. Also, bullhead fish are no more than 12-inches in length. Royalty-free animal clipart picture of a Yellow Bullhead fish (Ameiurus natalis) isolated on white, by Duane Raver. . This royalty-free cartoon styled clip art picture is available as a fine art print and poster. Clipart Illustration of a Yellow Bullhead Catfish (Ameiurus natalis) by JVPD Feb 21, 2020 · Common Name(s): Bullhead Catfish; Black Bullhead, Yellow Bullhead Creek Cats, Mud Cats, Yellow Cats, Black Cats, Polliwogs. Identification: There are seven species of bullhead catfishes, all native to North America and all within the genus Ameiurus. There are two common species of bullheads in Northwest Arkansas, the black and yellow.