Dark blue-green Doriopsis granulosa

March 7, 2003
From: Bill Rudman

This very dark blue-green animal was found on this orange sponge, which it appears to have been eating. The sponge was partly eaten and the nudibranch stayed on it for some hours in an aquarium, ignoring a small colony of the blue sponge Terpios, on the same rock. Terpios is the preferred food of the blue Doriopsis pecten. No radula differences could be found between the different coloured specimens. Without further evidence, and since this orange sponge is the preferred food of Doriopsis granulosa, I can only assume that it is a very dark form of that species.

Photo: Paagoumène, near Koumac, New Caledonia, 20°29.2'S, 164°10.2'E, Intertidal, coral platform with coral blocks, sea grass beds, 12 October 1993, 5mm long alive, AM C200451. Photo: Bill Rudman

Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Mar 7) Dark blue-green Doriopsis granulosa. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/9351

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