Related Clues:

• Certain pool athlete
• Wetsuit wearer
• Treasure hunter, perhaps
• Pearl gatherer
• Scuba specialist
• Going down, he may be saved by the bell
• One jumping off board
• Going down, he may be protected by the bell
• Large waterbird
• Fitzgerald hero takes the plunge?
• Salvage crew member
• A plunger may work under water
• He'll sink to any depths for money
• Drive (anag.)
• One should not be afraid to take the plunge