It belongs to the genus Fundulus in the killifish and topminnow family, Fundulidae.

It was formerly common in fresh and brackish ponds and marshes throughout Bermuda.

It has a declined as a result of destruction and modification of its habitat by humans and was listed as a protected species in the Bermuda Protected Species Act of 2003.

Its omnivorous diet includes green algae, molluscs, crustaceans and insects.

Its predators include herons, grey snappers and American eels, as well as the introduced eastern mosquitofish and red-eared terrapins.