Didangia carneyi is a species of aquatic flatworm belonging to the family Didangiidae.

When preserved, the dorsum is a whitish color with brown to pink pigment, which is more concentrated in the pharynx region.

The ventral surface is a cream-whitish color; the uteri are visible as two dark lines on each side of the pharynx.

[2] The specific epithet was given in honor of Dr. Robert Carney of Louisiana State University, as he was the chief scientist on the cruise that collected D. carneyi's type specimens.

[2] The only known distribution currently of D. carneyi is in the Gulf of Mexico off the coast of the state of Louisiana.