Aldisa sanguinea
(Cooper, 1873)

Suborder: DORIDINA
Family: Dorididae


Oregon to Gulf of California, Mexico.


North Monastery Beach, 10m, Carmel, California, USA. Approx 25mm long. Photo: Clinton Bauder.

Red with one or two dark spots in the dorsal midline which look like the oscula (exhalant pores) of sponges. There is sometimes traces of a light brown or cream transverse streak on each side the mantle about midway. Grows to about 25mm long.

Found from the intertidal to about 10m. The orange egg ribbons, form a 4 whorl spiral and a laid on their sponge food. It is reported to feed on the orange sponges Ophlitaspongia pennata and Hymendesmia brepha.

• Millen, S. V. & Gosliner, T. M. 1985. Four new species of dorid nudibranchs belonging to the genus Aldisa (Mollusca, Opisthobranchia), with a revision of the genus. Zoological Journal of the Linnean Society, 84(3):195-233.

Authorship details
Rudman, W.B., 2002 (February 18) Aldisa sanguinea (Cooper, 1873). [In] Sea Slug Forum. Australian Museum, Sydney. Available from

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