Assertion: sea urchin's body | /r/HasProperty | covered by spine
Facets:
Source sentences:
text: The body is covered by spines, which are long and sharp in some species and are used to protect the animals from predators.
text: The round, symmetrical body of the purple sea urchin is covered in spines that are initially green tinged with purple as juveniles, then blossom into bright purple as adults.
text: Sea urchins are very unique animals in that their bodies are covered with spines.