Related Clues:
- Hustler
- Great Barrier __
- Danger in dangerous waters
- Ship hazard
- Underwater habitat
- Hazard for a hull
- Atoll barrier
- Snorkeler's hangout
- Shorten, as a sail
- Haven for sea life
- Seagoing predator
- Nemo's home
- Place for scuba diving
- Site of many a shipwreck
- Ocean predator, of which there are five types starting this puzzle's longest answers