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They were first observed in Connecticut in the early 1980s at a few disjunct sites in the lower Housatonic and upper Quinebaug River drainages. Populations are expanding in both of these drainages, and individuals have recently been discovered in the Connecticut River drainage as well.
The white sucker is arguably our most important fish species.
Fish Descriptions and Distribution Maps Explained
Learn how to interpret the fish descriptions and distribution maps used to describe the freshwater fishes of Connecticut!
True to their names, sticklebacks have very sharp spines, which can be locked in an upright position, causing these little fish to be very unpalatable for most predators.
Adorned with an armament of long, sharp spines, white perch are difficult for both anglers and predators to handle.
Prefer backwaters and slow-moving areas of larger rivers and streams as well as lakes and ponds. They appear to be more tolerant of brackish water than channel catfish.
Warmouths can be distinguished from other sunfishes by feeling for the patch of small teeth on the tongue.
Introductions of green sunfish have been implicated with adverse impacts on other fish species.
Gizzard shad were first observed in Connecticut during the late 1970s, apparently the result of a natural range expansion.
Commonly sold as bait, the golden shiner is our most common lake and pond minnow species.
Not yet found in Connecticut, the Rudd has established populations in neighboring states.
Rock bass have relatively large mouths, so are commonly caught by anglers seeking larger gamefish.
Connecticut’s smallest pike species. They are typically mistaken for small chain pickerel by anglers.
In Connecticut, the redbreast sunfish typically outnumbers other sunfish species only in river environments.
The state's only parasitic fish to enter freshwater, the sea lamprey gets a bad reputation. Learn more about this fascinating fish.