Selection: Gastropteron bicornutum

Gastropteron bicornutum Baba & Tokioka, 1965

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Gastropteron bicornutum is characterized by orange-yellow spots and minute white spots covering the surfaces of the whole cephalic shield, dorsal hump and parapodia, and by the two dorsal posterior processes (only at picture #2 visible) from which the species gets its name. The parapodia have a thin black marginal line.
Thanks for identification of this specimen to Dr. Juan Lucas Cervera Currado.
There are pictures of a very similar species as Gastropteron sp. 2 at Robert F. Bolland's OKINAWA SLUG SITE, his Gastropteron sp. 1 looks also similar - the above specimens are possibly undescribed species of Gastropteron.
More informations on Gastropteron bicornutum are at Bill Rudman's Sea Slug Forum!