Saddleback Darter (Percina vigil)

Description: 

The Saddleback Darter is found in Gulf Coast drainages from Louisiana to Florida, including the Mobile Basin, and Mississippi and lower Ohio river drainages to Indiana, including the Tennessee River Drainage. They live over sand and gravel substrate in runs of creeks to medium rivers. As the common name suggests, Saddleback Darters have saddles across their back.