Nudibranch A sea slug of family Chromodorididae (or chromodorids). The exact name I haven't found yet. There's also some backscatter in the water that needed to be cleaned on the image. But the picture isn't that pretty anyway. Dive #354
Fig. 27: Sabang laguna, Mindoro island, Philippines — EXIF: Nikon D200; Δt=1/250 s; f=60 mm; f/11.0; ISO 100; 2009-11-06 10:58:00