Related Clues:

• Maritime hazard
• Miniature whirlpool
• Swirl in the stream
• Shipwreck site
• It may be near a drain
• "Electric Avenue" singer Grant
• Helmsman's challenge
• Atoll feature
• 10-Down current
• ___ shark
• Small vortex
• Erosion by-product
• Shallow sea area
• Coral buildup
• Atoll, essentially