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This species has been observed on Mauritius, Madagascar

Order : Nudibranchia Suborder : Euctenidiacea Superfamily : Polyceroidea Family : Polyceridae Distribution : Western indian ocean Maximal size : 80 mm Abundance : Species characteristics : It is charaterized by the yellowish-green markings between the rhinophores (not observed in our specimens) and the dark green colour with many yellow longitudinal lines The gills are highly branched and the yellow mid-dorsal lines extend up onto the gills
	Showing species characteristics...	Photo Yann von Arnim Mauritius, Ferme marine de Mahebourg, 20 m, December 2010, size : 60 mm

See more about : Sightening and mating periods

Remarks :

Identification confirmed by Nathalie Yonow
    The green marks between the rhinophores which are clearly present in Australian and Japanese specimens aren't observed in our specimens, like specimen from South Africa in Helmut Debelius's book
    Synonymous : (according Worms)
               - Nembrotha luteolineata Baba, 1936

Bibliographic data :

It has large downward pointing oral tentacles which are probably associated with locating and tracking down their prey
    The name "luteolineata" was obviously chosen to draw attention to the yellow lines down the length of the dorsum.
    It is distinguished from its similar sibling species, Roboastra gracilis, by its thinner mid-dorsal lines which extend up onto the gills and the gills themselves which are highly branched rather than simply pinnate in R. gracilis.
    It has been observed feeding on Nembrotha kubaryana, Tambja verconis and T. morosa

References :

Bill Rudman Seaslug site : Sea Slug Forum : Roboastra luteolineata
   Nudipixel Roboastra luteolineata

Publications :

Baba, K. (1936). Opisthobranchia of the Ryukyu (Okinawa) Islands. Journal of the Department of Agriculture, Kyushu Imperial University, 5(1) : 1-50, Pl. 1-3.

Other photos of Roboastra luteolineata :

Pierre Périès Mauritius, 25 m, 13 August 2014, size : 40 mm It has large downward pointing oral tentacles (a) which are probably associated with locating and tracking down their prey In this specimen the mid-dorsal lines don't extend up onto the gills

Alain-Benoît Rassat Madagascar, L'Arche, Nosy Bé, 27 m, 20 may 2014, size : 40 mm   In this specimen the mid-dorsal lines don't extend up onto the gills

Yann von Arnim Mauritius, Ferme Marine de Mahébourg, size : 80 mm

Nathalie Bazard Madagascar, Nosy Bé, taille : 40 mm

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