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This species has been observed on Mauritius

Order : Nudibranchia Suborder : Dexiarchia Superfamily : Arminoidea Family : Arminidae Distribution : New Zealand, South Australia, the Philippine Islands, Japan, Hawaii, Red Sea and now Mauritius Maximal size : 60 mm Abundance : Seldom if ever on the reef flat zone Species characteristics : Body pink to red with a series of longitidinal opaque white lines on the ridge Foot broad and has wide angular extensions anteriorly Oral veil with a scalloped margin and the elongated outside corners. The rhinophores are red
	Showing species characteristics...	Photo Geoffrey Summers Mauritius, Pointe d'Esny, less 1 m ,11 November 2014, size :35 mm

See more about : Sightening and mating periods

Remarks :

Identification confirmed by Nathalie Yonow
    Synonymous : according Gosliner and Fahey, 2011
              - Diphyllidia rubida Gould, 1852: original combination
              - Dermatobranchus rubidus (Gould, 1852) Kay, 1979
              - Dermatobranchus pulcherrimus Miller & Willan, 1986

Bibliographic data :

The body shape of the living animal is broad, flattened, and narrows at the posterior end.
    There are approximately five longitudinal dorsal ridges on each side of a larger median ridge
    The rhinophores have a series of longitudinal lamellae on the rounded club. The stalk does not narrow and there are no lamellae on it.
    The mantle, the oral veil, and the foot have a distinct white edge
    Active during the night

References :

Erwin koehler seaslug site : Philippine sea slugs : Dematobranchus rubidus
   Nudipixel Dematobranchus rubidus

Publications :

Gosliner T.M. & Fahey S.J. (2011) Previously undocumented diversity and abundance of cryptic species: a phylogenetic analysis of Indo-Pacific Arminidae Rafinesque, 1814 (Mollusca: Nudibranchia) with descriptions of 20 new species of Dermatobranchus . Zoological Journal of the Linnean Society 161: 245–356.

Other photos of Dermatobranchus rubidus :

Geoffrey Summers Mauritius, Pointe d'esny lagoon, 10 January 2016 The underside of this species with a large white stripe on the posterior area.

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