Re: Risbecia imperialis from Hawaii

January 9, 2007
From: Cory Pittman

Concerning message #19107:

Dear Bill,
Risbecia imperialis was virtually "nonexistent" around Maui [Hawaii, USA, Pacific] throughout the late 1980s and 1990s -- I saw my first specimen in 2000. However, since then they've increased steadily becoming one of the three or four most commonly seen chromodorids during the last couple of years -- often with as many as half a dozen seen during a single dive. So, there appears to be a long term population swing involved. Whether it's random or cyclic...?

More later,

Dear Cory,
Thanks for the observation. I look forward to 'more later' - any chance of some photos of it on its food sponge?
Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Jan 9). Comment on Re: Risbecia imperialis from Hawaii by Cory Pittman. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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