Rostanga aureamala is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Discodorididae.
This dorid nudibranch is bright orange to reddish-orange in colour and the dorsum is covered with caryophyllidia; in form it is very similar to other species of Rostanga. It grows to 45 mm (1.8 in) in length. It is illustrated as Rostanga sp. 3 in Gosliner, 1987.
This species was described from Algoa Bay, South Africa, 34°1′10.68″S 25°43′0.69″E / 34.0196333°S 25.7168583°E / -34.0196333; 25.7168583.
