Often found swimming near the surface, these fishes are easy to observe. Topminnows are small fishes with large eyes, a flattened head and back, upturned mouth, one dorsal fin far back on the body and no lateral line.

northern studfish--Fundulus catenatus
banded killifish--Fundulus diaphanus [state threatened]
northern starhead topminnow--Fundulus dispar

blackstripe topminnow -- Fundulus notatus
The blackstripe topminnow has a broad, blue-black stripe along its midside and a silver-white spot on the top of its head. The front of the dorsal fin base is located above the anal fin base. This small (to three inches) fish is found in rivers, streams, ponds and lakes. Feeding occurs in morning, late afternoon and evening. Terrestrial insects make up a large portion of the diet, with aquatic insects, crustaceans, snails and algae also eaten. Spawning occurs in the summer. Eggs are deposited singly on vegetation. blackspotted topminnow--Fundulus olivaceus