Trinchesia acinosa is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.
Distribution This species was described from New Caledonia. It has been reported from JapanImamotu, J. (2015). Photographs of Cuthona acinosa. Amami-Ooshima Islands, Japan and the Marshall Islands.Johnson, S. & Johnson, J. (2009) Cuthona acinosa (Risbec, 1928) Underwater Kwajalein.
Description The typical adult size of this species is 10–12 mm. The body is opaque white and the cerata, rhinophores, front of the head and oral tentacles are pale to bright orange.Bolland, R. (2015). Photograph of Cuthona acinosa - Aka Island, Kerama Islands, Okinawa
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