Dermatobranchus fortunatus  (Bergh, 1888)

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This species has been observed on Mayotte and Madagascar Islands

Order : Nudibranchia
Suborder : Dexiarchia
Superfamily : Arminoidea
Family : Arminidae
Distribution : Indo West Pacific
Maximal size : 15 mm
Abundance :

Species characteristics :

The general body colour is creamish with a serie of black to chocolate blotches arranged in about six to eight pairs on the lateral area of the mantle.These blotches are edged with orange along the margin

The base of the bulbous rhinophores is opaque white and the vertical ridges area of the rhinophores is dark chocolate and orange. the tips of the rhinophores are white

The oral veil is opaque white with a single median orange and black patch on the anterior end

Showing species characteristics...

Photo Norbert Verneau
Mayotte, Ilot Droumé, Les Badamiers, less 1 m, 16 March 2012

See more about : Sightening and mating periods

Remarks :

Identification confirmed by Hsini Lin
    Synonymous : (according worms)
                    - Pleuroleura fortunata Bergh, 1888

Bibliographic data :

The rhinophores are short and stout with a series of sharp vertical ridges below an elevated central spike
    This species have a long and slender body. The mantle which is slightly wider than the foot is very elongate and its margin are not wavy
    The anterior foot corners are rounded
    There are hidden gills between the foot and the mantle.
    This species is one of the more commonly encountered species of arminids in the Indo-Pacific tropics. (This is not the case in our region ... )
    This species looks like Dermatobranchus cf fortunatus

References :

Okinawa Seaslug Dermatobranchus fortunatus
   Medslug Dermatobranchus fortunatus

Publications :

Berg, R, 1888. Die Pleuroleuriden, eine familie der Nudibranchiaten gasträopoden. Zoologische Jahrbücher. Abteilung für Systematik Geographie und Biologie der Tiere. 36 : 348-364
    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.
    New record of nudibranch Dermatobranchus fortunatus in Singapore. Singapore Biodiversity records. 2015 : 111-112

Other photos of Dermatobranchus fortunatus :

Olivier Fournajoux
Madagascar, Baie d'Atongil,  7m,  size : 25 mm, 18 October 2018





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