Known only from La Jolla, California.
South Casa Reef, La Jolla, California, USA. Photo: Jim Lance
The body is translucent white with fine opaque white spots scattereed all over the dorsum and cerata. There are also irregular patches of a dull brown on the dorsum. The upper third of the smooth rhinophores and oral tentacles, have white pigmentation, and the middle third is brown. The ceratal wall is translucent clear with small opaque white spots scattered all over except at the tip. The ceratal digestive gland ranges in colour from light reddish brown to dark brown, except at the base, which is dark greenish in colour. It grows to about 14mm in length.
Behrens, D. W. (1987) Two new Aeolid nudibranchs from Southern California. The Veliger, 30: 82-89.
Rudman, W.B., 2005 (October 4) Cuthona hamanni Behrens, 1987. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/cuthhama