Fundulus grandis, the Gulf killifish, a fish species in the genus Fundulus
The Gulf killifish, (Fundulus grandis) is currently being used to test the effects of oil and oil dispersants, specifically Macondo 252 crude oil and Corexit 9500, on the physiology of marine species affected by these substances.
The lined topminnow, Fundulus lineolatus, is a small fish in the genus Fundulus which is found in swamps and backwaters from southern Virginia to Lake Okeechobee.
The Stippled studfish (Fundulus bifax) is a small freshwater fish which is endemic to the Tallapoosa River system in Georgia and Alabama, USA; and Sofkahatchee Creek (lower Coosa River system) in Alabama.