Related Clues:

• ___ diving
• Look at coral reefs, maybe
• Dive among coral reefs, say
• Take a dive, perhaps
• Breathe deeply?
• Diver's tank
• Diver's device
• Underwater swimmer's gear
• Underwater activity
• Breathing device
• Certain explorer's gear
• Underwater breathing gear
• Snorkel alternative
• Frogman's acronym
• Go deep, perhaps