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Pretty similar is Chelidonura pallida which differs by its black margin, followed by an orange-yellow band.
More Information on Chelidonura electra are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2016), published 25 June 2016, Chelidonura electra Rudman, 1970
available from https://www.Philippine-Sea-Slugs.com/Cephalaspidea/Chelidonura_electra.htm