Assertion: sea urchin's spine | /r/HasProperty | spatula-shaped spines
Facets:
Source sentences:
text: The spines on the oral side (bottom) of their bodies are spatula-shaped spines that mostly aid in movement across sandy or rocky bottoms.
text: The spines on the oral side (bottom) of their bodies are spatula-shaped spines that mostly aid in movement across sandy or rocky bottoms.