Unknown White Nudibranch..looks like an angel!

December 8, 2006
From: Sandy Grummon

On August 9, 2006 my husband, two friends and I were tide-pooling at Sisters Rocks on the southern Oregon coast (west coast of U.S.), about 50 miles north of the California border. It was 6:50 a.m. during a good low tide (-1.4. We were in an area of rocks, dense kelp and had been seeing dozens of sunflower stars, gumboot chitons, red sea cucumbers. We spotted a white nudibranch with cerata that looked more like little "wings". The wings looked translucent but the outer edges were a definite white.

Locality: Rocky intertidal area, 10", Oregon, United Statese, Pacific, 09 August 2006, Rocky intertidal. Length: Approximately 1"-1 1/4". Photographer: Bryan Grummon.

Sandy Grummon

sandygrumm@aol.com

Grummon, S., 2006 (Dec 8) Unknown White Nudibranch..looks like an angel!. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18951

Hi Sandy,

Gorgeous creature. Your species is the arminacean nudibranch, Dirona albolineata (see Eastern Pacific Nudibranchs, page 101). Your specimen is pretty typical in size for this species which feeds on bryozoans.

Frank Mace McFarland named this species albolineata [= white lined] because of the while edge to the flattened cerata.

Best wishes,
Dave Behrens

Behrens, D.W., 2006 (Dec 8). Comment on Unknown White Nudibranch..looks like an angel! by Sandy Grummon. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18951

Factsheet

Dirona albolineata

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