Assertion: crab's shell | /r/HasProperty | hard
Facets:
Source sentences:
text: They are covered with a hard shell, which would otherwise prevent growth.
text: Because they have a hard outer shell (the exoskeleton) that does not grow, they must shed their shells, a process called molting.
text: First, the octopus catches the crab by landing on top of it, then uses the suction discs to capture it and finally bite into its hard shell.
text: Hermit crabs are crabs that lack a hard shell; they use a discarded shell for protection.
text: The horseshoe crab has a hard outer shell, five pairs of legs and a long, thin tail which the horseshoe crab uses for changing direction whilst swimming rather than as a defensive weapon.