Re: Onchidoris bilamellata spawning

December 5, 2007
From: J. Hildering & G. Miller

Concerning message #10454:

Hereby reporting the annual mass spawning event of Onchidoris bilamellata from British Columbia. All animals found above 20'. Amazing density and highly active. One image shows the trailing behaviour reported in the message "Conga lines of brown nudis in California."

Interesting too to find several Hermissenda crassicornis atop the masses (photo available if of interest.)

Locality: Bear Cove, 15', British Columbia, Canada, Pacific Ocean, 02 December 2007, Rocks. Length: 1.5 cm. Photographer: Jackie Hildering.

Jackie Hildering and Glen Miller

earthlingenterprises@telus.net

Hildering, J. & Miller, G., 2007 (Dec 5) Re: Onchidoris bilamellata spawning. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21258

Dear Jackie and Glen,

This phenomenon must be an amazing sight - and so widespread in the northern hemisphere. If you think the Hermissenda were interested in the egg ribbons it would be useful to have a record of it on the Forum for future reference

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Dec 5). Comment on Re: Onchidoris bilamellata spawning by J. Hildering & G. Miller. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21258

Factsheet

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