August 9, 2006
From: Kevin Lee
Here are more photos of Bulla gouldiana [Gould's Bubble Snails] , still proliferating at La Jolla. Last week the critters were clumped in tight aggregations, perhaps amorous. In nearly all instances, the groups were intertwined in yellow stringy "stuff". Perhaps eggs of this species?
Locality: La Jolla Shores Canyon, Main Wall, 30~35 fsw, California, USA, Eastern Pacific, 27 July 2006, Sandy bottom. Length: 6 cm. Photographer: Kevin Lee.
firstname.lastname@example.orgKevin Lee, 2006 (Aug 9) Bulla gouldiana - egg laying. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/17315
It looks like you have found a group egg-laying. Some time ago - 3 years ago in fact - I posted a message [#9364] describing some research showing that some species of Sea Hare have a pheromone in their egg ribbon which they called attractin because it causes sea hares to aggregate around the egg ribbon. I have just noticed a couple of later papers on the topic which I will post a message about when I get a moment. The interesting point is that perhaps Bulla also has a pheromone in its egg ribbon to attract specimens of Bulla to aggregate around egg strings in the same way.
Bulla gouldiana aggregation, San Diego
From: Mike Neubig, May 25, 2006
Re: Gould's Bubble Snail - aggregation
From: Kevin Lee, May 25, 2006
Bulla gouldiana behaviour from San Diego
From: MIke Neubig, May 25, 2006
Gould's Bubble Snail - shell damage
From: Kevin Lee, May 3, 2006
Bulla gouldiana from La Jolla, California
From: Barbara Jeanne Lloyd, April 17, 2006
Bulla gouldiana - Gould's Bubble Snail
From: Barbara Jeanne Lloyd, February 27, 2006
Bulla gouldiana, detail of shell markings
From: Mike Neubig, February 27, 2006
Bulla gouldiana from San Diego
From: Mike Neubig, February 21, 2006