bubble shell

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Related to Cephalaspidea: bubble shell
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Noun1.bubble shell - marine gastropod mollusk having a very small thin shell
gastropod, univalve - a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes
genus Haminoea, Haminoea - common genus of marine bubble shells of the Pacific coast of North America