This species has been observed on Mauritius and Mayotte Islands
Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Polyceroidea
Tropical Western Pacific
Maximal size : Usualy less than 60 mm but sometimes 100 mm.
Abundance : (Mau) From time to time on the fore reef zone
Species characteristics :
Grey-green to dark green body with longitudinal wrinkles down the body and dark pustules
There are three basal gill stalks which split into five branching gills.
The gill filaments and lamellae are black as are the rhinophore clubs.
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"L’aquarium de Pereybere", Mauritius, 11 m, 12 October 2002, size 70 mm
See more about : Sightening and mating periods
Identification confirmed by Bill Rudman and Nathalie Yonow
According Nathalie Yonow " I think this species is not N. milleri but a species Eliot described from Zanzibar in 1904. He called it cristata or nigerrima (= kubaryana ). N. milleri is quite different, and this Indian Ocean species is turning up in lots of photos"
Bibliographic data :
This species like other
Nembrotha eating ascidians (sea squirts, tunicates).
One thing that was readily apparent was that this species is extremely difficult to photograph showing the color accurately, the velvety skin just soaks up the light making the animal look darker than it really is
When Gosliner and Behrens were describing N. milleri they observed a range in body coloration, and size of pustules.
Bill Rudman Seaslug site : Sea Slug Forum : Nembrotha milleri
Nudipixel Nembrotha milleri
Gosliner, T.M. & Behrens, D.W. (1997) Description of four new species of phanerobranch dorids from the Indo-Pacific, with a redescription of Gymnodoris aurita (Gould, 1852). Proceedings of the California Academy of Sciences, 49(9) : 287-308.
Other photos of Nembrotha cf milleri :
Richard Lai Cheong
"Maru", a fishing boat sank in 1987, at Trou aux biches, Mauritius, 25 m,
25 November 2006,
size 30 mm.
May be the difference of coloration with the three other specimens is a consequence of the velvety skin which just soaks up the light making the animal look darker than it really is
"Pointe Vacoas" at Pereybere, Mauritius,
20 August 2006,
size 60-65 mm
"L’aquarium de Pereybere", Mauritius,
12 October 2002,
size 100 mm
Maurice, 7 september 2013, size : 60 mm.
(a) Genital aperture on the right side...
Mauritius, îlot isolé au nord de petite terre proche de la barrière, 29 May 2017
Genital aperture on the right side...