It is a marine gastropod mollusc in the family Polyceridae.

This species has been found off the southern African coast off the Cape Peninsula in False Bay and off Durban in 2–30 m. The twin-crowned nudibranch is a smooth-bodied variably coloured nudibranch.

The ground colour is white or grey and there are usually black, yellow or orange stripes longitudinally along the notum, though these can be absent.

The animal may reach 30 mm in total length.

[2] The egg ribbon of this species is a wavy white spiral collar.