Related Clues:

• Sea-diving area
• Coral formation
• Castaway's site
• It has a certain ring to it
• Atoll protector
• See 41-Across
• Good snorkeling site
• Makin, for one
• Ring-shaped coral reef
• Shipping hazard
• Reduce a sail
• Butaritari, for one
• Bikini Island, e.g.
• Sandbank
• Ringlike coral island