Across
- 3. lack or scarcity
- 8. moving higher
- 10. deteriorate
- 11. not deep
- 12. simple aquatic plants
Down
- 1. lessen or sink down
- 2. eject forcefully
- 4. underwater ridge of rocks or coral
- 5. greenish-blue color
- 6. marine skeleton-building organism
- 7. moving away
- 9. ring-shaped coral island