Related Clues:
- A knot that seamen consider dangerous
- Feature of Hawaii's Molokini Crater
- Key, e.g
- Ocean hazard
- The Keys, essentially
- Spot for snorkelers
- Right charge returned for chain of rocks
- Coral chain
- Free travel is a concern of 22 across
- Boater's hazard
- Good area for snorkeling
- The knot sailors try to avoid
- Sound barrier?
- Coral expanse
- Clownfish habitat