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Polycera sp. 05  Genus: Cuvier, 1817

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Polycera sp. 05 is characterized by its white body colour, by branched white appendages, and by two thin brown transverse lines, one just in front of the rhinophores, the other one behind the gills. The rhinophores and the gills are white. The short velar tentacles are mottled translucent-white. There seems to be a clear area behind the rhinophores, there also seem to be lateral brown spots, impossible to tell from these dorsal pictures. This specimen had a total length of 4 mm.
To my knowledge are these the only pictures of this species, it is not in IPN nor at the internet!
It looks somehow similar to Polycera sp. 2 in IPN at page 103:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp., because of the "clear areas around the eyes" (IPN). Of that species are many pictures as
Polycera sp. e160 at Underwater Kwajalein - Marshall Islands Sea Slugs,
they differ from the above Polycera sp. 05 by the greenish-tan colour of the notum, by irregular lines of minute brown spots, by greenish-tan rhinophores, and by relatively small appendages.