This species is only found in South Africa.
The cowled nudibranch is a white to pinky-red nudibranch distinguished by its large extendable hood. Knobbly paired cerata extend down the margins of the smooth notum. The notum and cerata may have opaque white encrustations. It can grow as large as 50 mm in total length.
The cowled nudibranch feeds on small crustaceans, capturing them with its oral hood.