Gulf Killifish

Fundulus grandis

The Gulf Killifish is a hardy estuarine forage fish common in Gulf Coast marshes and lagoons. It tolerates wide salinity swings and is an important live bait species, especially around grass edges and tidal creeks.

Brackish

Gulf Killifish reference image — Noel Burkhead, cc-by-sa, via Wikimedia Commons. Source: Wikimedia Commons.

Identification points

Olive-brown body with small pale speckles or vertical bars
Deeply rounded caudal fin with a distinct black spot at the base
Two separate dorsal fins set far back on the body

Habitat

Shallow Gulf Coast estuaries, salt marshes, back bays, tidal creeks, and brackish ponds; often over mud or submerged vegetation in very shallow water.

Bait notes

Best as live bait for redfish, speckled trout, flounder, and other estuarine predators. Also takes tiny jigs, small shrimp imitations, and small soft plastics if targeted.

Behavior

Schooling and highly adaptable, it feeds on small crustaceans, worms, insect larvae, and detritus. It moves with tides and often stays tight to shallow cover in warm water.

Caution

none notable

Fishing notes

Seine, cast net, or trap around marsh edges and creek mouths for bait; when angling for them, use small hooks, light line, and tiny pieces of shrimp, worm, or bread near grass and shallow tidal flow.