Jethro Tull Album Named for a Breathing Apparatus

Puzzle 13 of Predators Hard Pack

Question is: Jethro Tull Album Named for a Breathing Apparatus

and the answer is: AQUALUNG

Word Meaning:

AQUALUNG — (underwater diving) A piece of equipment consisting of an oxygen tank and breathing apparatus used by divers to allow them to breathe underwater.

Definitions from Wiktionary.