a suborder of mollusks lacking a shell in the adult and having external respiratory appendages usually on the dorsal surface.

Order Nudibranchia ("naked gill") a shell-less snail in the mollusk family, having have outer gills in the form of featherlike appendages surrounding the anus (called anal gills). Nudibranchs also have a pair of rhinopores (sensory tentacles) on their heads.

is another name for a sea slug. Sea slugs are often flamboyantly colored.

any of various marine gastropods of the suborder Nudibranchia having a shell-less and often beautifully colored body

a colourful underwater snail without a shell, carrying its respiratory organ on its back) The interaction of tropical and temperate species makes every dive an exhilarating adventure

a small colorful snail-like animal you find between the corals

Shell-less marine snails.

Animals of the phylum Mollusca and class Gastropoda. Nudibranchs, sometimes referred to as sea slugs, take many different shapes and can be an array of colors.

Sea slug. A member of the mollusc class Gastropoda that has no protective covering as an adult. Respiration is carried on by gills or other projections on the dorsal surface.

A sea slug; member of a group of snails without shells that breathe through long, feathery gills on their backs.

A type of marine mollusk with a broad, muscular ventral foot and external gills

Nudibranchs are sea slugs belonging to the suborder Nudibranchia, the largest suborder of the order Opisthobranchia. There are more than 3,000,000 described species.