Assertion: catfish's spine | /r/HasProperty | locked into place
Facets:
value: as a defense
type: PURPOSE
Source sentences:
text: As a defense, these spines may be locked into place so that they stick outwards, which can inflict severe wounds.
text: Catfish venom glands are found alongside sharp, bony spines on the edges of the dorsal and pectoral fins, and these spines can be locked into place when the catfish is threatened.