Assertion: crustacean | /r/HasAspect | hard exoskeleton
Facets:
Source sentences:
text: All crustaceans have a hard exoskeleton which protects the animal from predators and prevents water loss.
text: Most crustaceans have hard exoskeletons.
text: Anatomy: This crustacean has a hard exoskeleton that protects and supports the body.