Connecticut Department of Energy & Environmental Protection

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Freshwater Fishes of Connecticut

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  • Mummichog

    They are sold as bait at coastal bait shops (where they are often called “killies” or “mummies”) and are popular due to their toughness and ability to survive in fresh water.

  • Goldfish

    Learn about goldfish in Connecticut, an introduced species that is native to Asia and common in urban ponds.

  • Shortnose Sturgeon

    Learn about the shortnose sturgeon, a state and federally endangered species that call the CT River home.

  • Grass Carp

    Native to China and Siberia, this gigantic freshwater fish has been widely stocked for weed control.

  • Fourspine Stickleback

    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.

  • Perches and Darters

    Perches are distributed throughout temperate fresh waters of the Northern Hemisphere. However, all of the many species of diminutive darters are native only to North America.

  • Threespine Stickleback

    Freshwater populations exist as far south as Massachusetts, but none are known in Connecticut.

  • Northern Pike

    The northern pike is Connecticut’s largest strictly freshwater gamefish.

  • Redbreast Sunfish

    In Connecticut, the redbreast sunfish typically outnumbers other sunfish species only in river environments.

  • Smallmouth Bass

    Due to their hard-fighting abilities, smallmouths are considered by many to be superior gamefish to largemouths.

  • Hybrid Sunfish

    Hybrids are more common in unfished or lightly fished waters, most likely because they are easier to catch than the parent species and are thus removed more quickly from heavily fished waters.

  • Black Crappie

    Also called “calico bass,” crappie grow quickly and are a popular food and sport fish.

  • Largemouth Bass

    The most popular gamefish in the country, the largemouth bass is also the principal predator in most of our state’s lakes and ponds and thus plays a key role in the health of aquatic ecosystems.

  • Blackspotted Stickleback

    Rarity and difficulty with identification cause the blackspotted stickleback’s whereabouts in Connecticut to be unclear.

  • White Catfish

    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.

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