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Brook Stickleback

Culaea inconstans (species), “Common Freshwater Stickleback”, “Common Stickleback”, “Five-Spined Stickleback”, “Pinfish”, “Six-Spined Stickleback”, “Variable Stickleback”

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The brook stickleback (Culaea inconstans) is a small freshwater fish that is distributed across the US and Canada. It grows to a length of about 2 inches. It occupies the northern part of the eastern United States, as well as the southern half of Canada. Small populations are scattered throughout the Mississippi-Great Lakes basin extending to Colorado, New Mexico, Kentucky, Tennessee, etc., though some of these areas are not native to the species. This small fish inhabits clear, cool streams and lakes. They eat small invertebrates, algae, insect larvae, and occasionally their own eggs. They are also preyed upon by smallmouth bass and northern pike. Feeding time is usually dawn and sunset. The brook stickleback does have active competition mostly from minnows, but feeding times are…

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Range Maps show field notes recorded by Natural Atlas contributors and other datasets via GBIF.org

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