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Roboastra luteolineata (Baba, 1936) [Nembrotha]

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Roboastra luteolineata is charaterized by the yellowish-green markings between the rhinophores and the dark green colour with many yellow longitudinal lines. It has large downward pointing oral tentacles which are probably associated with locating and tracking down their prey. The highly pinnate gills are dark, the same colour as the body, but the outer and inner sides of the rachis are green.
Pretty similar is Roboastra tentaculata which differs by its broad orange bands.
The juveniles of Roboastra luteolineata are very similar to Roboastra gracilis, which has no dark line on the gills and lacks the yellowish-green markings between the rhinophores.
Rie Nakano sent 2 pictures to the Sea-Slug Forum showing the differences, she wrote:
"Juvenile R. luteolineata is just like R. gracilis, but the color of the gills is obviously different."
More information on Roboastra luteolineata are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2016), published 5 April 2016, Roboastra luteolineata (Baba, 1936)
available from http://www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Roboastra_luteolineata.htm