Across
- 3. Device to keep a ship in place
- 6. Tool used for hunting in the ocean
- 8. Shell from a marine mollusk
- 10. Intelligent marine mammal
- 11. Crustacean with large claws
- 12. Reef-building organism
- 16. Eight-armed sea creature
- 17. Underwater ecosystem
- 18. Related to the sea or ocean
- 19. Giant marine mammal
- 20. Shelled marine reptile
- 21. Coastal bird
- 22. Cephalopod mollusk
Down
- 1. Flow of water in the ocean
- 2. Floating marker in the water
- 4. Shellfish that produces pearls
- 5. Gelatinous ocean creature
- 7. Small organisms drifting in water
- 8. Underwater vessel
- 9. Sunken vessel
- 13. Reef-building organism
- 14. Large seaweed
- 15. Underwater plant
- 20. Daily rise and fall of ocean levels
- 22. Apex predator of the sea