Marine Biology

3. The deepest part of the ocean, generally between 4,000 and 6,000 meters.
7. The "dark" zone of the open ocean, roughly 1,000 to 4,000 meters deep
13. An organism that thrives under high pressure.
14. Pertaining to the deepest regions of the ocean, often found in trenches 6,000 to 11,000 m
15. Free-swimming organisms in the pelagic zone, capable of swimming against currents.
16. The "twilight" zone of the open ocean, roughly 200 to 1,000 meters deep.
17. The production of light by a living organism.
18. The process of generating energy (food) from inorganic chemical reactions, often occurring near deep-sea vents.
19. Pertaining to the water column in the open ocean.

1. The zone of the open ocean or open water, not near the bottom.
2. Zone of the open ocean from 4,000 to 6,000 meters deep.
4. All the animal life in a particular region.
5. The process where one tectonic plate moves under another.
6. An organism that thrives in physically or geochemically extreme conditions.
8. A fissure in the ocean floor from which super-heated, mineral-rich water is released.
9. A submersible vehicle designed for the exploration of ocean depths.
10. A long, narrow, deep depression in the ocean floor, typically one marking a plate boundary
11. A distinct layer in a large body of water where the chemical composition changes significantly with depth.
12. Organisms floating or drifting in a body of water.
13. Pertaining to the sea bottom or the organisms that live there.