Related Clues:

• Bikini feature
• Subsurface hazard
• It's just below the waves
• Keel scraper
• Wreck site
• Type of knot
• Coral habitat
• Snorkler's interest
• Snorkeling spot
• Mariner's peril
• Diver's place
• Site of a wreck, perhaps
• Where a yacht might run aground
• Ocean obstacle
• Sea hazard