The juvenile form.

The mantle is soft, and a black line (a) runs between the foot and the mantle.

The dorsum is dark with whitish tubercles.

The large five (or six?) compound gills which form a circle around the anus emerge from a deeply lobed branchial pocket.

Philibert Bidgrain

Réunion, Etang Salé on the rocky coast, less 1 m, 13-15 December 2006, size : 25 mm

Intermediate form

The mantle colour is black surrounding large tubercles. These have a white base and are capped with orange brown.

Nathalie Rodrigues

Réunion, Cap la Houssaye, on the rocky coast, 30 May 2014

Nathalie Rodrigues

Réunion, January 2015

Intermediate form

The mantle colour is black surrounding large whitish tubercles

Mais sur ce spécimen les branchies et les rhinophores ont une teinte marron foncé (a), comme l'adulte...

But in this specimen, gills and rhinophores have a dark brown color ( a), as an adult

Adult form

A black or dark brown background colour on the mantle is often found

Yvon Gildas

Mayotte, Passe en S - buoy n°3, 6m, 12 September 2009