Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Doridoidea
Family : Chromodorididae
Distribution : Indo-West Pacific
Maximal size : 60 mm
Abundance :

The body is a dull reddish-pink colour , with many irregularly shaped and sized white patches scattered all over

At the edge of the mantle there is a bright yellow submarginal line and a black line of similar width or three lines, the innermost bright yellow, then a black line and right at the edge a translucent region which appear blue or greenish-blue

The rhinophore is darker reddish-pink with white specks

The numerous simple, unipinnate gills are pinkish with black edging, arranged in an arc with the ends spiralling inwards

This widespread Indo-West Pacific species seems to have three regional colour forms (see Bill Rudman Sea slug forum).

The Southwest Pacific form has a bluish white (outer), then black, then yellow (inner) bands on the mantle edge.
    The Philippines - Indonesia colour form has a bluish outer band on the mantle edge but the inner black and yellow lines tend to merge into a dull khaki band.
    The East African colour form have a bright yellow submarginal line and a black line of similar width at the edge

Philippines-Indonesia colour form

The body is a dull reddish-pink colour, with many irregularly shaped and sized white patches scattered all over.

       - At the edge of the mantle where there is distinct bluish outermost band as in Australian material but the black and yellow bands are less easy to define. They merge into a dirty yellow-brown (dull-kaki) comes darkest alongside the blue marginal band

          - The background colour is a darker reddish-brown and the speckling appears a brighter white than in Est africa and Australian specimens

          - The foot as the same banding along the edge as the mantle but much fainter

       - At the edge of the mantle there is a bright yellow submarginal line and a black line of similar width at the edge. The extreme edge of the mantle is so thin that on microscopic examination there appears to be a fine translucent white line there
          - On the mantle the white speckling is sparser in the midline making the central region somewhat darker. In most specimens there is a broad band down each side of the mantle, running from just behind the rhinophores, and meeting behind the gills. In this, the white speckling is replaced by yellow so that there diffuse yellowish tinge surrounding the central region of the mantle (not observed in Mayotte specimen, for the moment...)
          -The side of the body and dorsal part of the posterior foot are the same colour, the edge of the foot being bordered with a yellow submarginale and a black marginal line

          - There are three lines at the edge of the mantle, the innermost bright yellow line, then a black line and right at the edge a translucent region as wide as the black and yellow lines which appear blue or greenish-blue

             - The yellowish tinge of the mantle is quite absent

             - The side of the foot in not clearly bordered with a black outer and yellow inner lines. Some specimen have a distinct black line at the edge and no yellow line while other range from lacking a coloured border to the foot to having a shadowy green-black line just in front the edge of the foot

Simon Deblock

Reunion, Cap la Houssaye, 10 m, May 2018, size : 30 mm

The Southwest Pacific form has a bluish white (outer), then black, then yellow (inner) bands on the mantle edge with an inner extra black line (a)

According Gary Cobb, it coud be another Glossodoris sp

Alain-Benoît Rassat

Madagascar, Nosy bé, Olaf, 20 m, 23 July 2013, size : 70 mm

The Southwest Pacific form has a bluish white (outer), then black, then yellow (inner) bands on the mantle edge with an thin inner extra black line (a)

Fabrice Schubert

Mayotte, Musical plage, 3-4 m, 20 January 2011

A typical southwest Pacific form with a bluish white (outer), then black, then yellow (inner) bands on the mantle edge.

Strange for the South-west Indian Ocean area????

Christophe Mason-Parker

Seychelles, Lilot, Mahé, 12 m, 31 August 2012

A typical Philippines - Indonesia colour form with a bluish outer band on the mantle edge and where the inner black and yellow lines tend to merge into a dull khaki band.

Matthias Deuss

Mayotte, Récif barrière interne au nord de Koungou, 2 m, 30 December 2009, size : 40 mm

On the mantle, between the rhinophores, the white speckling is sparser in the midline making the central region somewhat darker.