amazing small sea creature doriprismatica cyanomarginata is species of sea slug, dorid nudibranch, shell-less marine gastropod

animal aquatic background biology blue bright close closeup colorful coral creature diving fish flatworm gastropod gills indonesia invertebrate island isolated life macro marine mediterranean mollusc mollusk natural nature nudibranch ocean pacific red reef scuba sea slug snail tropical undersea underwater water white wild wildlife worm yellow zoology