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Snail Bullhead. Black blotch at dorsal fin base. Can be mottled, short, rounded anal fin. Relatively large eye.

 Snail Bullhead. Mottled version, Eno River, NC. It can be confusing when you find populations like this, but understanding range maps and the fact that Spotted Bullheads (Ameiurus serracanthus) are hundreds of miles away will help. Short, rounded anal fin, around 19 anal fin rays. Relatively large eye. Black blotch at dorsal fin base.

White Catfish. I see this misidentified the most out of all Catfish in North America. Key: Moderately forked caudal fin with short, rounded anal fin. No spots as in most juvenile Channel Catfish (Ictalurus punctatus). The largest of the "Bullheads", White Catfish are in the Genus Ameiurus along with the Black, Yellow, Brown, Flat, Snail and Spotted Bullheads.

 Black Bullhead. Black chin barbels (lower 4), sometimes a white crescent marked shape on base of caudal fin. Rounded caudal fin. Dark pigment between the fin rays is also useful, not always, but it's a good supplemental ID character (Zach Alley 2021).

Yellow Bullhead. White or yellow chin barbels, smaller eye than other Bullheads. Sometimes yellow in appearance, normally on the flanks or belly.

Brown Bullhead. More of a brown appearance but can vary greatly due to water conditions. Brown chin barbels, sometimes mottled. Caudal fin squared. Larger eye than the Yellow Bullhead.

 Flat Bullhead. One of the trio of Bullheads that are easily identified by a black blotch at the base of the dorsal fin. Only Flat, Snail and Spotted Bullheads have this black blotch. Mottled appearance in some populations, flat head (not always on larger individuals). Most often confused with the Snail Bullhead (Ameiurus brunneus), Flat Bullhead's however will have a slightly longer anal fin with more rays. The anal fin is also more squared off than the Snail Bullhead's rounded anal fin

Spotted Bullhead. Small range (FL, GA, AL), black blotch at dorsal fin base, spotted body, very short anal fin, rounded.