Tropical Indo-West Pacific.
Kerama Is. near Okinawa, Japan. 5m depth. Length 2 to 3mm. PHOTO: Atsushi Ono.
Small, but brightly coloured, snail-like sea slug. The fragile bubble-shaped shell is completely enveloped by the mantle. On the right side of the mantle there is an elongate exhalent siphon. The head is produced into a pair of enrolled tentacles or rhinophores which lead to a deep lateral groove on each side. The eyes are embedded beneath the skin and can be seen as two black spots just in front of the shell. There is a large central mucus gland in the sole of the foot which probably produces a sticky mucus enabling the animal to stick on the algae on which it is found. It is black with large yellowish warts on white patches.
We know nothing of the biology or food of any species of Colpodaspis.
The placing of Colpodaspis with Diaphana and Newnesia in the Diaphanoidea, by most experts, is a marriage of convenience rather than a convincing statement of phylogenetic relationships. Further studies are required before we can say anything sensible about their relationship to each other and to other opisthobranchs.
• Brown, G.H. (1979) An investigation of the anatomy of Colpodaspis pusilla (Mollusca: Opisthobranchia) and a description of a new species of Colpodaspis from Tanzanian coastal waters. Journal of Zoology, London, 187: 201-221.
Rudman, W.B., 2000 (February 3) Colpodaspis thompsoni Brown, 1979. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/colpthom
Re: Colpodaspis thompsoni from the Red Sea
From: Oren Lederman, August 19, 2008
Colpodaspis thompsoni mating
From: Ayumi Murakami, July 15, 2008
Nudibranch or cowrie?
From: James A. Loyola, November 1, 2007
Colpodaspis thompsoni from Reunion Island
From: Philibert Bidgrain, August 21, 2007
Colpodaspis thompsoni from the Solomon Ids
From: Donald Brown, August 15, 2007
Colpodaspis thompsoni laying eggs
From: Ayumi Murakami, November 3, 2006
Colpodaspis thompsoni in southern Queensland
From: Gary Cobb, July 20, 2006
Colpodaspis thompsoni from the Red Sea
From: Oren Lederman, October 24, 2005
Colpodaspis thompsoni from Christmas Island
From: W.B. Rudman, May 7, 2002
Colpodaspis thompsoni from NE Sulawesi
From: Jim Anderson, August 12, 2001
Colpodaspis thompsoni from Kerama Id
From: Atsushi Ono, February 4, 2000