November 27, 2003
From: Ken Ashman
Dr. Rudman -
I thought you might like this image of Berthella strongi - it shows the texture of it's skin. I came across the slug at San Miguel Island, California, at about 35ft.
firstname.lastname@example.orgAshman, K., 2003 (Nov 27) New photo of Berthella strongi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/11519
One of the main external differences between this and Berthella californica is that this species has a smooth mantle while in B. californica the larger white spots are on raised tubercles. The smooth nature of the skin can be seen clearly in your photos.
The presence of sea anemones in the photo make me wonder just what this species eats. Dave Behrens (1980) reports it being associated with compound ascidians, which may well be its food, but I don't know of any sightings of it actually feeding
Sponge prey of Berthella from the NE Pacific
From: Jeff Goddard, July 20, 2007
Berthella strongi from southern California
From: Jeff Goddard, April 10, 2002
Re: Berthella strongi
From: Dave Behrens, March 21, 2002
From: John Dorsey, March 20, 2002