gastropods

any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior

(b) (Zool.) Having an angular projection on one or both sides, as in certain bivalve shells, the foot of some gastropods, etc.

as, branchiferous gastropods.

-- applied to certain gastropods.

any of various edible tropical marine gastropods of the genus Strombus having a brightly-colored spiral shell with large outer lip