Related Clues:

• Coral construct
• Atoll's makeup
• Frozen floater
• Ship wrecker
• Icy North Atlantic hazard
• Shipwreck locale
• Diver's haunt
• Arctic ice mass
• Atoll, for one
• Coral Sea hazard
• Arctic hazard, for short
• Floater in the Arctic Ocean
• Cold water hazard
• Coral line
• Marine hazard