Pikachu Nudibranch - Thecacera picta

Yes, there is Pikachu Nudibranch, but this is the white version, the closer to Pikachu is the brown species, Thecacera pacifica. Thecacera picta has white translucent body, with black markings and and edges. Tips of cerata, rhinopores and oral tentacles are black, orang and white. Very small in size, usually less than 1 cm.