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This Aeolid Nudibranch has been mis-identified many times as Cuthona yamasui, with the genus also wrongly placed, and now updated to the genus Tenellia. Tenellia was a small genus until a DNA phylogeny of the former family Tergipedidae resulted in most species of Cuthona being transferred to this genus. This picture is of a yet to be described Tenellia species. It has brown oral tentacles and rhinopores with white spot on the tip of its rhinopores. Its cerata are blue in colour with yellow/gold band and brown borders on the yellow band. This Aeolid Nudibranch feeds on Hydroids, which it is resting on, but covered with sands.