Related Clues:
- Atoll composition
- Great Barrier Reef material
- Marine polyps, forms reefs
- Bank of jagged rock near the surface of the sea
- _____ Rapids, Ontario
- Atoll former
- Aquatic habitat
- Great Barrier, for one
- Pinkish shade
- Underwater ridge
- Scuba spot
- Reddish orange
- Backdrop for some schools
- Natural barrier
- Repurposed shipwreck