It is a marine gastropod mollusc in the family Aegiridae.

[2] This species is found off the South African coast from the Atlantic coast of the Cape Peninsula to Port Elizabeth.

[3] The knobbly nudibranch is a small (up to 15 mm) white-bodied dorid with numerous knobbles projecting from its body.

Its rhinophores emerge from knobbled sheaths.

[4] This species may feed on encrusting sponges.