Aplodinotus

Aplodinotus is a genus of freshwater fish in the family Sciaenidae, commonly known as drums or croakers. The genus currently contains only one recognized species, Aplodinotus grunniens, which is widely distributed throughout North and Central America. This species is also known by several common names, including freshwater drum, sheepshead, and gaspergoo.

Aplodinotus grunniens is characterized by its deep body, small mouth, and large, rounded scales. It typically has a mottled gray or brown coloration, with darker markings on its back. A distinctive feature is the presence of a swim bladder that produces a drumming or croaking sound, which gives the family its name. They can grow to considerable sizes, with individuals over 50 pounds not uncommon.

The freshwater drum is an opportunistic bottom-feeder, consuming a diet that includes crustaceans, insects, mollusks, and smaller fish. They inhabit a variety of freshwater environments, from large rivers and lakes to reservoirs and slow-moving streams. They are often found near the bottom, where they forage for food.

This species is of some importance to commercial and recreational fisheries. While not as prized as some other game fish, they are caught and consumed. The drumming sound produced by their swim bladder has also been studied for its role in communication and mate attraction.