Often Transparent Ocean Floaters That Can Sting
Puzzle 6 of Uses for a Shoebox Pack
Question is: Often Transparent Ocean Floaters That Can Sting
and the answer is: JELLYFISH
Word Meaning:
JELLYFISH — An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
Definitions from Wiktionary.