Fundulus confluentas
Goode and Bean 1879
Family Fundulidae

Lateral view of a marsh killifish
The marsh killifish pictured above was collected in Walton County, Florida in 2014. It is now part of the Florida Museum ichthyology collection, UF 187996. Florida Museum photo by Zachary Randall

The marsh killifish is a member of the topminnow family. It has an overall slender body, and females have a large ocellus at the rear of the dorsal fin. Large males are typically olive-blue and have light blue to to yellow spots on the side of the body, the dorsal, anal and caudal fins and the orange and yellow paired fins. There are typically four pores on each mandible. The marsh killifish is a marine species that enters marshes, bayous, tidal streams, creeks and small rivers. Marsh killifish are usually found in areas of dense, submerged vegetation.

Status & distribution

  • Status — Marine invader
  • Florida Distribution — Western and North Central drainages and the Gulf Coast, South Florida and the Atlantic Coast
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