The Okaloosa darter (Etheostoma okaloosae) is a fish indigenous to freshwater streams and tributary systems in Okaloosa and Walton Counties in northwest Florida. It is a small and elongated fish, less than 50 mm in length.
Because of extensive habitat improvement and efforts by the Jackson Guard at Eglin Air Force Base, the US Fish and Wildlife Service downlisted the species from endangered to threatened status in 2011.
All known habitats of the fish (tributaries of Rocky, Toms, and Boggy Bayou) are presently being affected by commercial development and/or road construction.