Related Clues:
- Biodiverse habitat
- Diver's domain
- Something for snorkelers to look at but not touch
- Pilot's hazard
- Seaman's knot
- Lough near French capital is covered by shallow water
- Snorkeling spot, perhaps
- Popular snorkeling destination
- Rocky part of sail
- Land line?
- Bank of jagged rock near the surface of the sea
- Atoll former
- Aquatic habitat
- Great Barrier, for one
- Underwater ridge