Assertion: whelk's shell | /r/HasProperty | mollusc
Facets:
value: usually
type: DEGREE
Source sentences:
text: The term "shellfish" is defined in the New Shorter Oxford English Dictionary as "any aquatic invertebrate animal whose outer covering is a shell, usually a mollusc (as an oyster, a winkle, a mussel, etc.) or a crustacean (as a crab, a prawn, a shrimp, etc.), especially one regarded as edible.
text: All clams are bivalve (two shells) mollusks that obtain their food by pumping water through their system and filtering small organisms from surrounding waters.