The Okaloosa darter is a fish indigenous to fresh-water streams and tributary systems in Okaloosa

Okaloosa County, Florida

Okaloosa County is a county located in the state of Florida. Located in northwest Florida, it extends from the Gulf of Mexico to the Alabama state line. As of the 2000 census, the population was 170,498. The U.S. Census Bureau 2005 estimate for the county is 182,172. The 2009 estimate for the...

 and Walton Counties

Walton County, Florida

Walton County is a county located in the state of Florida. As of 2000, the population was 40,601. The U.S. Census Bureau 2005 estimate for the county is 50,324. Its county seat is DeFuniak Springs, Florida. The county is home to the highest natural point in Florida: Britton Hill, at .- History...

 in northwest Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

. It is a small and elongated fish, less than 50 millimeters in length.

Because of extensive habitat improvement and efforts by the Jackson Guard at Eglin Air Force Base

Eglin Air Force Base

Eglin Air Force Base is a United States Air Force base located approximately 3 miles southwest of Valparaiso, Florida in Okaloosa County....

, the US Fish & Wildlife Service

United States Fish and Wildlife Service

The United States Fish and Wildlife Service is a federal government agency within the United States Department of the Interior dedicated to the management of fish, wildlife, and natural habitats...

downlisted the species from endangered to threatned status in 2011.

All known habitats of the fish (tributaries of Rocky, Toms and Boggy Bayou) are presently being impacted by commercial development and/or road construction.