Found throughout the tropical Indo-West Pacific.
Coffs Harbour Region, northern New South Wales, Australia, December 1990. PHOTO: Bill Rudman.
Defensive coloration in sea slugs
Formerly known as Trippa osseosa. See message
Atagema osseosa is an example of how many nudibranchs have evolved to perfectly match their surroundings. This species has the same colour and texture as the sandy sponge on which it lives and feeds. There are also a series of darker markings (patches without spicules) which match the oscula or waterholes in the sponge.
• Kelaart, E.F. (1858). Description of new and little known species of Ceylon nudibranchiate molluscs and zoophytes. Journal of the Ceylon Branch of the Royal Asiatic Society,
Columbo, 3(1): 84-139.
Rudman, W.B., 1998 (October 14) Atagema osseosa (Kelaart, 1859). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/triposse
Re: Atagema osseosa from sthn Queensland, Australia
From: Julie Marshall, September 11, 2006
Atagema osseosa from sthn Queensland, Australia
From: Gary Cobb, August 9, 2006