Firm-Fleshed Fish With Poisonous Spines
Puzzle 20 of Yoga Hard Pack
Question is: Firm-Fleshed Fish With Poisonous Spines
and the answer is: WEEVER
Word Meaning:
WEEVER — Any of the usually brown fish in family Trachinidae, which catch prey by burying themselves in the sand and snatching them as they go past.
Definitions from Wiktionary.