Typical adults reach a length around 40–60 cm (16–24 in), with some specimens reaching as much as 30.1 kg (66.4 pounds) and 101.5 cm (40.0 in). Pectoral fins protrude ventrally like the anal fins, the caudal fin has even lobes, and the dorsal fin protrudes from the top of the hump to a blunt point, then shortens and runs the remaining length of the body to the base of the tail. They are characteristically stocky, having a hump that rises up from the operculum. Fin colors match the portion of the body where they attach and are generally darker towards the tips.
The coloration of smallmouth buffalo ranges from shades of gray to brown and coppery green dorsally and pale yellow to white ventrally. Despite being members of different scientific families, these three species superficially resemble the common carp ( Cyprinus carpio), but an easy and notable difference is that all catostomids lack the characteristic barbels of carp.
niger), although the smallmouth buffalo's mouth is located ventrally like other Catostomidae species, while the bigmouth buffalo's mouth is terminal and opens forward, and the smallmouth buffalo's eyes are significantly larger than those of the black buffalo. It is a long-lived, stocky fish like its relatives the bigmouth buffalo ( I. The smallmouth buffalo ( Ictiobus bubalus, from the Greek for "bull-fish" and "buffalo") is a catostomid fish species native to the major tributaries and surrounding waters of the Mississippi River in the United States, as well as some other water systems where it has been introduced.
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