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Gymnodoris ceylonica is characterized by its translucent white body with red spots and large red-lined white gills. There is an orange band at the margin of the foot, the rhinophores are translucent white with orange tips.
Pretty similar is:
Gymnodoris impudica which differs by orange spots, by orange rhinophores, and by branched gills, which are simple in Gymnodoris ceylonica.
More information on Gymnodoris ceylonica are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 1 September 2017, Gymnodoris ceylonica (Kelaart, 1858)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Gymnodoris_ceylonica.htm