Rock bass

Rock bass (*Ambloplites rupestris*) is a freshwater fish in the sunfish family, Centrarchidae, native to east-central North America.

Rock bass (*Ambloplites rupestris*) is a freshwater fish in the sunfish family, Centrarchidae, native to east-central North America. It is known by several common names, including red eye, goggle-eye, rock perch, and black perch. The species is typically associated with clear, rocky habitats and is distinguished from similar sunfishes by its six anal fin spines.

Description

Rock bass are stout freshwater sunfish with a large mouth, red eyes, and a dark spot on the opercle (gill cover). They are often brownish, olive, or greenish in colour and can be identified by six anal fin spines.

Distribution and habitat

The species is native to east-central North America, including parts of the Great Lakes, St. Lawrence, and Mississippi River drainages. It is most often found in clear streams, rocky shorelines, and lakes with hard cover such as rocks and logs.

Behaviour and diet

Rock bass are mainly benthic feeders and feed on aquatic insects, crayfish, worms, and small fish. They often remain near cover and are active around dawn and dusk.

Reproduction

Spawning occurs in spring. Males create and defend nests over sand or gravel, and they guard the young until the fry disperse.

Relation to anglers

Rock bass are commonly treated as a panfish and are caught in many parts of their range. They are known for their stocky build and their association with rocky habitat.