Green Sunfish - Lepomis cyanellus
The green sunfish is another marginal introduction found scattered in the lower Yellowstone and Little Missouri river drainages of southeastern Montana. They are hardy little fish, tolerating a wide range of temperature, turbidity, and oxygen levels in slow-moving streams, ponds, or lakes. Green sunfish in Montana seldom exceed 5 inches in length although they are readily caught on a variety of baits. The food of this species, as with the other sunfishes, is primarily insects, crustaceans, and small fishes.
Body robust. Gill rakers long and slender. Breeding males have light-colored fringe on dorsal, anal, and tail fins.
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Slow-moving streams at lower elevations and shallows of lakes. Tolerates turbid water, high temperatures and low dissolved oxygen.
Aquatic insects, small crustaceans and fishes, and small amounts of plant material.
Well suited to radically changing conditions found in prairie streams.
Sexually mature at end of 2nd growing season. Spawns May - midsummer in shallow areas with clean bottom at 60 degrees F.
- Additional ReferencesLegend: View Online Publication
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- Barfoot, C.A. 1993. Longitudinal distribution of fishes and habitat in Little Beaver Creek, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 66 p.
- Clancey, C.G. 1978. The fish and aquatic invertebrates in Sarpy Creek, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 54 p.
- Mullen, J.A. 2007. Spatiotemporal variation of fish assemblages in Montana prairie streams. M.Sc. Thesis. Bozeman, MT: Montana State University. 102 p.
- Penkal, R.F. 1977. Black bass populations of the Tongue River Reservoir, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 111 p.
- Rosenthal, L.R. 2007. Evaluation of distribution and fish passage in relation to road culverts in two eastern Montana prairie streams. M.Sc. Thesis. Bozeman, MT: Montana State University. 78 p.
- Stringer, A.L. 2018. Status of Northern Pearl Dace and chrosomid dace in prairie streams of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 150 p.
- Wuellner, M.R. 2007. Influence of reach and watershed characteristics on fish distributions in small streams of eastern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 80 p.
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