Related Clues:

• Lagoon enclosure
• Ringlike coral reef
• Christmas Island, for one
• Wreck site
• Coral isle
• Type of knot
• Island surrounding a lagoon
• Coral habitat
• Snorkler's interest
• Snorkeling spot
• Lagoon border
• Mariner's peril
• Diver's place
• Site of a wreck, perhaps
• Where a yacht might run aground