Bulla gouldiana aggregation, San Diego
May 25, 2006
From: Mike Neubig
Following on from my last message [#16670] I thought you might enjoy this group photo of eight Bulla gouldiana. Also in the photo is a mucus tube derived from an individual that is off the left edge of the photo. This photo depicts a particularly dense cluster. More generally, in this region of the canyon rim, today, there would be 2 Bulla per field.
Locality: Valley-Sea-Toes, La Jolla Shores, 14m, California, USA, Eastern Pacific Ocean, 20 May 200, sandy sloping shoulder of La Jolla Canyon. Length: 20 mm typ (shell). Photographer: Mike Neubig.
Mike Neubig
mike.neubig@gmail.com
Neubig, Mike, 2006 (May 25) Bulla gouldiana aggregation, San Diego. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16673Dear Mike,
It certainly looks like this is a good year from Bulla gouldiana in the San Diego region. In this photo it looks like the Bulla are grazing on a dark brown algal or bacterial layer covering the bottom. The pale grey areas, I presume, are areas they have scraped the layer off. From my experience, species of Bulla tend to feed on green algae or 'algal' layers like this.
Best wishes,
Bill Rudman
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