Connecticut Department of Energy & Environmental Protection
Freshwater Fishes of Connecticut
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A newly discovered invasive species, the knobfin sculpin has had a devastating impact on the Pomperaug River ecosystem.
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Western Mosquitofish have been widely introduced across the globe as a biocontrol with mixed results.
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The Eastern Mosquitofish has been widely introduced as a biocontrol with mixed results.
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An introduction to mosquitofishes in Connecticut.
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Gizzard shad were first observed in Connecticut during the late 1970s, apparently the result of a natural range expansion.
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The banded sunfish is listed as a Connecticut State Threatened Species. Their small size makes them vulnerable to predation by bass and other large gamefish, so they thrive only in protected, backwater areas.
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Atlantic salmon were extirpated from the Connecticut River and, despite extensive restoration efforts, self-sustaining runs do not occur.
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Blueback herring and alewives are so similar that the color of the gut lining (peritoneum) is the only sure way to tell them apart.
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Mudminnows are a small family of the Northern Hemisphere that look similar to killifish and minnows, but are actually more closely related to pike.
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Adorned with an armament of long, sharp spines, white perch are difficult for both anglers and predators to handle.
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Although relatively feeble fighters on rod and reel, walleye are an esteemed game and food fish throughout their range.
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Striped bass grow large and are arguably the most important inshore predator and sport fish in the state.
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Kokanee prefer relatively clear lakes with cold, well-oxygenated water.
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Looking a lot like other shiners gave the mimic shiner its name.
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Two native and one introduced pike species exist in Connecticut. All members of the family are predacious, primarily feeding on fish.