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Across 1. The scientific term for the Abyssal Zone. 6. The Greek god affiliated with Hadal Zones. 8. The life-giving "suns" of the deep sea. 9. The deepest trench on Earth. 11. The mythological Kraken is one of these. 12. The reason why humans cannot explore the deep seas. 13. An excess chemical created in the process of bioluminescence. 14. A cephalopod that can transform into a spiky ball. 15. The best defense mechanism for most deep sea creatures. 16. The other chemical used in the process of bioluminescence. 18. A creature's ability to use artificial light. 19. The scientific term for the Hadal Zones. 20. One chemical used in the process of bioluminescence.

Down 2. A good example of a user of bioluminescence. 3. The "producers" of deep marine food pyramids. 4. A small organ that can produce light (found on vampire squid). 5. A giant squid's favorite meal. 7. The term commonly used to describe the deepest hadal zones. 10. The primary consumers of the deep. 17. The skin of the giant tube worm.