Related Clues:

• One who works under pressure
• Water bird
• Scuba user
• Wreck explorer
• Navy Seal, e.g.
• Reef visitor
• Loon, e.g.
• Frogman
• Springboard performer
• Frogman, e.g.
• Sea explorer
• Olympic athlete
• One going down
• Sealab inhabitant
• Pearl seeker