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!.
More information on Bulla ampulla are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2016), published 21 June 2016, Atys sp. 01  Genus: de Montfort, 1810
available from https://www.Philippine-Sea-Slugs.com/Cephalaspidea/Bulla_ampulla.htm