Cuthona hamanni
Behrens, 1987

Family: Tergipedidae


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.
Authorship details
Rudman, W.B., 2005 (October 4) Cuthona hamanni Behrens, 1987. [In] Sea Slug Forum. Australian Museum, Sydney. Available from

Related messages

Cuthona hamanni Behrens 1987

October 5, 2005
From: Dave Behrens


Since you have been discussing species of Cuthona lately, I thought I'd send you Cuthona hamanni, named after Brancher buddy, Jeff Hamann, of El Cajon, California. This photo was taken by another Brancher buddy, Jim Lance, at South Casa Reef, La Jolla, California.

Dave Behrens

Behrens, D., 2005 (Oct 5) Cuthona hamanni Behrens 1987. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Dave,
Thanks for filling in another gap. At least in your part of the world, the number of species of Cuthona seems manageable. In SE Australia we seem to have a few endemics and the potential to meet any species which lives in the Indo-west Pacific, so I suspect it will be many years before we sort them out as we never seem to find any species in large numbers or with any regularity.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Oct 5). Comment on Cuthona hamanni Behrens 1987 by Dave Behrens. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from