Colourful Nudibranch (Chromodoris wallani), very nice colourful nudibranch on indistinct background, Sipidan, Mabul, Malaysia.

underwater nudibranch nudibranches colourful chromodoris wallani coloured yellow orange white blue black sipidan mabul malaysia one animal close up close up close ups close ups coral corals coral reef sea slug sea slugs seaslug seaslugs invertebrates invertebrate