Freshwater

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• Western Mosquitofish

  Western Mosquitofish have been widely introduced across the globe as a biocontrol with mixed results.

• Knobfin Sculpin

  A newly discovered invasive species, the knobfin sculpin has had a devastating impact on the Pomperaug River ecosystem.

• Mosquitofishes

  An introduction to mosquitofishes in Connecticut.

• Eastern Mosquitofish

  The Eastern Mosquitofish has been widely introduced as a biocontrol with mixed results.

• Freshwater Record Fish Photos

  View Connecticut's freshwater record fish with pictures!

• Sheepshead Minnow

  The sheepshead minnow is a standard for use in many laboratory toxicity and genetics studies.

• Killifishes

  Both marine and freshwater killifishes are distributed throughout Central and Eastern North America from southern Canada to the Yucatan, including Cuba and Bermuda.

• Herring Closure

  Emergency Fishery Closure is in effect for Alewife and Blueback Herring. Read on for more information.

• Striped Killifish

  This is the largest killifish species in Connecticut and the least tolerant of fresh water.

• Fish Descriptions and Distribution Maps Explained

  Learn how to interpret the fish descriptions and distribution maps used to describe the freshwater fishes of Connecticut!

• Sunfishes and Freshwater Basses

  There are eleven sunfish species in Connecticut, only three of which are native.

• Temperate Basses

  All North American members of the family are important gamefish, and some support significant commercial fisheries.

• Common Carp

  Learn all about common carp, one of Connecticut's biggest and hardest fighting fish!

• Creek Chubsucker

  Creek chubsucker populations have reportedly declined in streams that are subject to siltation.

• Alewife

  Anadromous alewives are important forage fish for large gamefish such as striped bass and bluefish as well as many other animals, including osprey and marine mammals.