nudibranch

animal aquarium aquatic biology blue bright chromodoris close closeup color colorful colors colourful coral creature dive diving dorid exotic fauna gastropod gills hem hypselodoris indonesia invertebrate lembeh life macro manado marine micro mollusc mollusk nature north nudibranch ocean one pacific pictures pink purple red reef reticulata robe scuba sea seaslug seaside slug snail strait sub sulawesi tentacle the tropical undersea underwater vibrant water wild wildlife yellow