Giorgio Cavallaro Uwp http://www.uwphotographers.net/2013/10/uwp-malida-alcazar.html
Yutaka Takizawa Very nice shot....(^。^)
Ron SilverGlossodoris sibogae
Patricia Perret I think that it is Glossodoris atromarginata Ron Silver
Ron Silver Deep yellowish/brown body color is indicative of G. sibogae while light yellow to tan body is indicative of G. atromarginata.
Ron Silver Patricia, Here's a photo of G. atromarginata: http://www.seaslugforum.net/find/glosatro
Patricia Perret This picture is a little bit overexposed so te white margin close to the black one is difficult to see well. The gills are very black http://www.nudipixel.net/species/glossodoris_atromarginata/