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This seahare is in many publications labelled as Stylocheilus longicauda (Quoy & Gaimard, 1825), but as Bill Rudman discusses is Stylocheilus longicauda greenish/yellow with red spots circled with blue and other spots of white and blue.
The oldest valid name for this species is Stylocheilus striatus (Quoy & Gaimard, 1832).
Pretty similar is Bursatella leachii which lacks the dark longitudinal lines.
More information on Stylocheilus striatus are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2015), published 31 December 2015, Stylocheilus striatus (Quoy & Gaimard, 1832)
available from https://www.Philippine-Sea-Slugs.com/Aplysiida/Stylocheilus_striatus.htm