Assertion: eagle ray's tail | /r/MadeOf | 2 to 6 long venomous spines
Facets:
value: with injecting barbs
type: OTHER
Source sentences:
text: Their tail is 2.5 to 3 times longer than the disc length and contains 2 to 6 long venomous spines with injecting barbs at the base which are used for self-defense.