[2] The greenbreast darter is marked with red spots along the flanks, greenish-brown lips and a turquoise anal fin.

The breeding males are olive in overall colour with an indistinct pattern of 3 to 11 dark vertical bars along the flanks.

[3] The green breast darter is restricted to the upper Mobile Basin (but not present in the Tombigbee River drainage), primarily above the Fall Line, and often a very common species in suitable habitats.

[4] Greenbreast darter adults typically occur in riffles of clear creeks and small to medium rivers, in moderate to strong current with gravel or rubble substrate.

[1] The greenbreast darter was first formally described in 1891 by the American ichthyologist Charles Henry Gilbert (1859–1948) with the type locality given as Choccolo Creek, tributary of Coosa River at Oxford, Calhoun County, Alabama.