Phyllidia coelestis nudibranch, Beqa Lagoon, Fiji.

beqa lagoon fiji melanesia oceania phyllidia coelestis sacoglossa animal animal markings animal themes aquatic bumpy close up color image gastropod horizontal invertebrate living organism macro magnification marine biology mollusk no people nudibranch one animal outdoors photography science sea sea life sea slugs sea snails species tubercle underwater warty sea slugs wildlife yellow zoology