Colga pacifica in situ

March 19, 2009
From: Jeff Goddard

Concerning message #10978:

Hi Bill,

I've been identifying nudibranchs for the Olympic Coast National Marine Sanctuary in Washington State and thought this image of Colga pacifica in situ would be of interest. The distance between the green laser points is 10 cm [see top of upper photo], and some of the other organisms visible in the larger image are crinoids, gorgonians, brachiopods, holothuroid feeding tentacles, galatheid crabs, and various sponges.

Locality: 48.2581 degrees N, 125.01138 W, 170 m, Washington, USA, Northeast Pacific Ocean, 29 May 2006, Deep-water, rocky. Length: 5 cm. Photographer: Olympic Coast National Marine Sanctuary

To my knowledge this is the first record of C. pacifica off Washington. Henning Lemche identified it from a sample obtained in the mid 1960's from 247 m off the northern Oregon coast (Pereya and Alton, 1972; reviewed by Goddard, 1990).

  • Goddard, J. H. R. (1990) Additional opisthobranch mollusks from Oregon, with a review of deep-water records and observations on the fauna of the south coast. The Veliger, 33(3): 230-237.
  • Pereya, W. T. & Alton, M. S. (1972) Distribution and relative abundance of invertebrates off the northern Oregon coast. Pp. 444-474 In: A. T. Pruter & D. L. Alverson (eds.), The Columbia River estuary and adjacent ocean waters. University of Washington Press: Seattle, Washington.

Best wishes,

Goddard, J.H.R., 2009 (Mar 19) Colga pacifica in situ. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Jeff,

Do you know of we have any solid information on their food. I agree with the general thought that they are probably bryozoan feeders, but it would be nice to be sure.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Mar 19). Comment on Colga pacifica in situ by Jeff Goddard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Colga pacifica

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