Rock Bass, Ambloplites rupestris


Short description of Ambloplites rupestris, Rock Bass

Average length: 15-25cm (maximum recorded 43cm), longevity: about 10 years.   Family Centrarchidae (sunfish). Able to change colour to match their surroundings to some extent. Similar in appearance to smallmouth bass (Micropterus dolomieu) but usually smaller.

Description of Ambloplites rupestris, Rock Bass status in GB

Rock bass was introduced between 1925-1949 and possibly again in the 1990s. Status uncertain, but distribution limited (a single pond, Linkside Lake, Oxfordshire in the 1970s) and possibly extinct.

Habitat summary: Ambloplites rupestris, Rock Bass

Inhabits vegetated stream margins and pools of small to medium rivers, plus rocky and vegetated margins of lakes. Most common in clear, silt-free rocky streams. In Europe, avoids fast waters but found in a range of slow to stagnant waters. Possibly restricted to a single pond in GB or extinct.

Overview table

Environment: Freshwater
Species status: Non-Native
Native range: Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Nova Scotia, Ontario, Saskatchewan, Yukon
Functional type: Predator
Date of first record: Unknown

Distribution map

GB Distribution from NBN Atlas

Author's name:

Dr. David Hubble

Last updated:

September 22nd 2016

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