Gastropod n. : One of the Gastropoda.

Example:
Why do some Gastropod shells have striking colors and patterns while others are dull and drab colors?

Taxonomy
gastropods, shell, species, marine gastropods, clade, snails, class Gastropoda, gills, land snails, ganglia, fossils, fossil gastropods, Sensory organs, terrestrial gastropods, slugs, tentacles, eyes, ranks.

Defination from the web:
gastropod include edible species such as abalone, conches, periwinkles, whelks, and numerous other sea snails which ... See also: :fr:Gastropoda (classification phylogénétique) and List of marine gastropod genera in the fossil record ...