Semper in Bergh, 1876
Published records from Great Barrier Reef, Philippines, Vietnam. Probably tropical Western Pacific.
UPPER: Channel between Wistari Reef and Heron Id, Queensland, May 1981. 43mm long alive. Photo: Bill Rudman.
LOWER: Heron Is, Queensland, December 1981. 65mm long alive. Photo: G. Avern.
Ceratosoma gracillimum can be distinguished externally by the complete absence of the mantle edge between the head and the well-developed lateral lobes on each side, just in front of the gills. Can grow up to about 12cm in length.
• Rudman, W.B. (1984) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: a review of the genera. Zoological Journal of the Linnean Society, 81: 115-273.
• Rudman, W.B. (1988) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: the genus Ceratosoma J.E. Gray. Zoological Journal of the Linnean Society, 93(2): 133-185
Rudman, W.B., 2000 (September 17) Ceratosoma gracillimum Semper in Bergh, 1876. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/ceragrac
Ceratosoma gracillimum from Alor, Indonesia
From: Francois Zylberman, April 24, 2008
Ceratosoma gracillimum feeding?
From: Kamal El Tawil, April 2, 2008
Ceratosoma gracillimum from Singapore
From: Lior Harari, September 3, 2007
Possible juvenile Ceratosoma?
From: Charles Raabe, August 20, 2007
Re: Ceratosoma gracillimum feeding? from Lembeh
From: Ken Tucker, July 23, 2007
Colour variations of Ceratosoma trilobatum?
From: Mike Krampf, December 22, 2006
Ceratosoma gracillimum? from Komodo Ids
From: Teresa Zubi, December 11, 2003
Ceratosoma gracillimum from north Sulawesi
From: Francis & Pirjo Pellet, December 10, 2003
Ceratosoma gracillimum from the Solomon Ids
From: Bruce Potter, November 29, 2001
Ceratosoma gracillimum from Japan
From: Atsushi Ono , September 19, 2000