Phidiana indica (Bergh, 1896) [Learchis

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Phidiana indica is characterized by a white body with a median longitudinal white line which branchs between the rhinophores, running to the oral tentacles. The head is orange, the rhinophores and oral tentacles are orange with yellowish/white tips. The cerata are brown/orange with yellowish tips and a bluish line between.
Very similar is Phidiana militaris. They can be distinguished by the line between the rhinophores: Phidiana indica has a white line, Phidiana militaris has an orange or red line.
Bill Rudman writes: Phidiana indica is "also placed in the genera Learchis, Caloria, Hervia and Facelina by various authors. The correct generic placing cannot be resolved at present."
More information on Phidiana indica are on Bill Rudman's Sea-Slug Forum!