Nudibranchs

Part of speech: noun

Definitions

1. Aquatic invertebrates without shells that belong to the class of gastropods, displaying various shapes and colors as well as diverse dietary preferences in marine environments
2. Marine creatures known for their lack of a hard shell, which exhibit striking colors and varied forms while playing important roles in their ecosystems
3. Soft-bodied marine invertebrates classified under gastropods, recognized for their vibrant colors and unique shapes while often contributing to the health of ocean habitats

Etymology: "Nudibranchs" is the plural of "nudibranch," a name for the brightly coloured sea slugs that have shed their shells. The name is a scientific coinage from the 19th century, built from Latin roots: "nudus" meaning "naked" and "branchia" meaning "gills." Taxonomists formed the Latin group name "Nudibranchia" from these parts, and the English word came from that Latin label. The name describes a visible feature. Many nudibranchs expose their feathery gills on their backs rather than hiding them inside a shell or under a mantle, so the naming scientists pointed straight at that bare, gill-bearing body. The word is therefore a plain descriptive compound, and its meaning has stayed close to its original sense.

Synonyms: sea slugs, gastropods, mollusks