Bell-Shaped Cnidarian, a Relative of Hydras
Puzzle 1 of Deep Sea Journey Hard Pack
Question is: Bell-Shaped Cnidarian, a Relative of Hydras
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.