Bulla ampulla  Linnaeus, 1758

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One of the most common cephalaspideans in the Philippine islands is Bulla ampulla, at least at the divesite "Dauin" on Negros Oriental island. I saw more than 2 dozens of them on a single nightdive, this shot shows 4 specimens!.
The 3 mm specimen pictures #8 and #9 was identified by Dr. Richard C. Willan, thanks! Picture #9 shows for reference as BBQ stick 2 mm in diameter.
More information on Bulla ampulla are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2017), published 29 March 2017, Bulla ampulla  Linnaeus, 1758
available from https://www.Philippine-Sea-Slugs.com/Cephalaspidea/Bulla_ampulla.htm