Huge egg mass - Doris montereyensis ?

August 14, 2007
From: Jackie Hildering

Hello Bill and David,

In full understanding that you prefer not to deal with photos of egg masses alone - please feel free to disregard this submission.

I so send it because I was just blown away by the sheer size of it. It was at least 22 cm in diameter (having used my light to estimate size). In my floundering about to match egg masses to nudibranchs in our area I do feel more secure of the bigger species and do believe this to be the mass of Doris montereyensis. Just want to contribute as it may be of some value to know how big these masses might get.

Locality: Browning Wall, 43', British Columbia, Canada, Pacific Ocean, 06 August 2007, w. Photographer: Jackie Hildering.

Best wishes,

Hildering, J., 2007 (Aug 14) Huge egg mass - Doris montereyensis ?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Hi Jackie,

Ouch. There is no question that this looks like the egg mass of a dorid, but you have several species of Doris in your area capable of laying a mass this size. You are likely correct, and we note the huge size. It is notably large, but sorry, can't render an ID.

Dave Behrens

Behrens, D.W., 2007 (Aug 14). Comment on Huge egg mass - Doris montereyensis ? by Jackie Hildering. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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