Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Phyllidioidea
Family : Phyllidiidae
Distribution : Indo-West Pacific Ocean. Known from the western Pacific Ocean, South China Sea, Timor Sea and across the Indian Ocean to South Africa. .
Maximal size : 60 mm
Abundance : Frequently on the fore reef zone

The rhinophores and rhinotubercules are yellow.
   The particular "Y" shape of the blue-grey dorsal ridges.
   The median black band, with two to four isolated, large, yellow capped tubercles.
   The broad blue-grey band with small tubercles on the mantle margin.
The foot sole has no distinctive markings.

Bibliographic data :

Material examined by David J.Brunckhorst ( see reference/publications).

20mm specimen, Reunion island, 1-20 m depth, 1987, M.Jay

Other external morphology characteristics

Live specimens ranged in length from 9-60 mm and average size was 33 mm.
    The notum has three black longitudinal bands; two of these bands run laterally, each on the outside of two, mediolateral, blue-grey ridges which have tubercles capped in yellow.
    The blue-grey ridges, which may be interrupted in some specimens, originate anteriorly behind each rhinophore and converge posteriorly in the region of the anus.
    Two to four isolated, large, yellow capped tubercles arise from the median black band; however, these are never joined as a midline ridge.

Detail of the mantle. The grey coloration isn't homogenous, but due to the accumulation of tiny spots

Florence Trentin

Reunion, "Eboulis reef" at Saint Leu, 15 m, 26 December 2006, size 20-22 mm

A specimen with numerous yellow capped tubercles and some black spots scattered into the blue-grey margin.

Delphine Dupin

Reunion, Saint Leu, 10 October 2004

In this specimen, some black spots are scattered into the blue-grey margin.

The medium black longitudinal band is interrupted and only present between the isolated, large, yellow capped tubercles

Hugues Flodrops

Reunion, "Pain de Sucre" at Boucan Canot, 7-8 m, 20 December 2006, size 35 mm.

The medium black longitudinal band is partially interrupted at the level of the isolated, large, yellow capped tubercles

Eva Fontaine

mtsanga Mbouéanatsa at Mayotte, on the reef flat zone, less 1 m, 19 July 2008, size 25 mm.

A specimen with numerous yellow capped tubercles and a interrupted black longitudinal band