Assertion: mollusk's foot | /r/CapableOf | act as sucker
Facets:
value: in forms
type: OTHER
Source sentences:
text: In forms having only a top shell, such as limpets, the foot acts as a sucker attaching the animal to a hard surface, and the vertical muscles clamp the shell down over it; in other molluscs, the vertical muscles pull the foot and other exposed soft parts into the shell.