Related Clues:

• Tropical fish hangout
• Coral deposit
• Coral structure
• Bikini feature
• Subsurface hazard
• It's just below the waves
• Keel scraper
• Wreck site
• Type of knot
• Coral habitat
• Snorkler's interest
• Mythical knot that's difficult to untie
• Snorkeling spot
• Mariner's peril
• Diver's place