Limacia cockerelli and scaleworm

September 24, 2008
From: Richard Zade

Concerning message #21390:

Here is a new association for you. A juvenile scaleworm on a Limacia cockerelli.

Locality: Port Townsend, 90 feet, Washington, USA, Puget Sound, 08-25-2008, Logs on a silty bottom. Length: ?. Photographer: Richard Zade.

Richard Zade

Zade, R., 2008 (Sep 24) Limacia cockerelli and scaleworm. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Rich,

Good eyes. Now that folks are looking closer at sea slugs, this kind of association is becoming more common. The only problem is we don't understand what the association is. Is the worm feeding on the slug, or just walking over it.

Note to others, Rick is assisting, Bill Pence and Doug Mason, two high school science instructors in California, in a genetic study to determine whether the three color forms of this dorid, are distinct species themselves. External morphological differences suggest they might be, but internal anatomy is largely identical.

Thanks for sharing,
Dave Behrens

Behrens, D.W., 2008 (Sep 24). Comment on Limacia cockerelli and scaleworm by Richard Zade. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Limacia cockerelli

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