This species has been observed on Reunion Island

Order : Nudibranchia Suborder : Dexiarchia Superfamily : Fionoidea Family : Fionidae Distribution : Tropical Indo-West Pacific Maximal size : 25 mm Abundance : Seldom if ever... Species characteristics : The general body colouration is transparent with varying amounts of opaque     The rhinophores (pale reddish brown or transparent ), which arise from a common base, are smooth and relatively short     The cerata are arranged in transverse rows with each row being situated on top of a ridge     The cerata are opaque white and uniformly pinkish brown or weakly banded with brown and cream.
	Showing species characteristics...	Photo Maurice Jay Reunion

See more about : Sightening and mating periods

Remarks :

Bibliographic data :

Phestilla sp. 1 could be confused with Phestilla lugubris but in Phestilla lugubris the ceratal surface bears numerous, low, irregular nodules and white patches.
    The cerata are long and cylindrical with a rounded tip. The ceratal surface is regularly pleated. Sometimes the tip is white and separated by a darker ring from the rest of the ceras.
    The oral tentacles are broad, relatively short, and their tips are pointed.
    Phestilla sp. 1 lives and feeds on species of the scleractinian coral genus Goniopora (family Poritidae).
    The spawn consists of numerous, creamish, cup-shaped spirals attached to the host coral by their narrow end.

References :

Bill Rudman Seaslug site : Sea Slug Forum : Phestilla sp1

Other photos of Phestilla sp1 :

Maurice Jay Reunion Phestilla sp1 in a colonie of Goniopora sp. The rhinophores (pale reddish brown ), which arise from a common base, are smooth and relatively short

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