Smallmouth bass

The smallmouth bass (*Micropterus dolomieu*) is a freshwater fish in the sunfish family, native to eastern-central North America.

The smallmouth bass (Micropterus dolomieu) is a freshwater fish in the sunfish family, native to eastern-central North America, including parts of Canada such as the Great Lakes–St. Lawrence region. It is a popular game fish known for its strength when hooked and its preference for clear, cooler waters with rocky habitats. The species has been introduced widely outside its native range, including in Canadian waters.

Taxonomy and naming

The smallmouth bass is scientifically named Micropterus dolomieu and belongs to the sunfish family, Centrarchidae. It is one of the black basses and is widely known by nicknames such as smallie and bronzeback.

Distribution and habitat

The species is native to eastern-central North America, including the Mississippi River basin and Great Lakes–St. Lawrence system. It prefers clear water with rocky bottoms and is often found in rivers, lakes, and reservoirs. In Canada, it is native to parts of the Great Lakes–St. Lawrence region and has been introduced more widely in provinces such as Ontario and New Brunswick.

Behaviour and diet

Smallmouth bass feed on crayfish, insects, frogs, and smaller fish. They are known for their aggressive strikes and strong fight, which has helped make them a major sport fish.

Human use and introductions

The species has been stocked and introduced far beyond its native range across North America. In some places it is considered invasive because it can prey on native species and compete with them.