Dear Chantal,
This looks like another example of whatSun, Alex and Gustav nominated as  a '...putative argus-vitiensis hybrid with vitiensis background colour and ocellar spots similar to argus'. This is in their 2013 paper in the Zoological Journal of the Linnean Society (Colour, confusion, and crossing: resolution of species problems in Bohadschia (Echinodermata: Holothuroidea).

From: flmnh-aspidolist [mailto:[log in to unmask]] On Behalf Of Chantal Conand
Sent: 30 March 2014 15:51
To: [log in to unmask]
Subject: Bohadschia sp?

Dear colleagues

I just received this photo (without sample nor spicules) from Mauritius, I believe it is a Bohadschia, but which species please?
Best regards from Paris

Chantal Conand