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This species has been observed on Mauritius and Madagascar Islands

Order : Nudibranchia Suborder : Dexiarchia unassigned Cladobranchia... Family : Proctonotidae Distribution : Indo West Pacific Maximal size : 40 mm Abundance : Species characteristics : This species has an orange to yellow body color. The cerata are yellow/orange with a black/dark purple and white to blue distal portion. There is a branched sensory structure between the rhinophores called a caruncle
	Showing species characteristics...	Photo Yann von Arnim Mauritius, "Mahebourg Marine Farm", 24 m, 30 September 2010, size : 50-60 mm

See more about : Sightening and mating periods

Remarks :

Identification confirmed Nathalie Yonow
    This species looks like Janolus sp 1 from Gosliner, 2007 and Debelius, 2007 books...

Bibliographic data :

Member of this family (Janolus) have a branched sensory structure between the rhinophores called a caruncle. The dorsum is covered with cerata, with branches of the digestive gland.
    Rhinophores and long and for the color of cerata
    Cerata are also present on the anterior end of the notum in front of the rhinophores.
    They eat arborescent species of bryozoans.
    When disturbed this species autotomize the cerata, which are sticky and adhere to anything that they come in contact with.

References :

Nudipixel Janolus sp

Other photos of Janolus sp1 :

Alain-Benoît Rassat   Madagascar, Nosy bé, 2 m, December 2016, size : 70 mm Lamellated rhinophores...

Yann von Arnim   Mauritius, "Mahebourg Marine Farm" Member of this family (Janolus) have a branched sensory structure between the rhinophores called a caruncle (a)

Alain-Benoît Rassat   Madagascar, Nosy bé, "olaf" during the night, 20 m, October 2012 A specimen with an intense blue coloration on the tips of the cerata

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