This appears to be an undescribed species of Hypselodoris. We have this species in the Marshall Islands, and Gosliner et al 2015 figure it as Hypselodoris sp. 10. This one was at Minilog.
We did not actually see the one below while diving. It and one other like it showed up in the background while several people were taking turns photographing an Ardeadoris cruenta, and its presence was not noticed until examining the images later. 10mm.
Created 15 June 2015
Updated 29 March 2017
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