Across
- 4. Third area of the sea floor that is relatively flat
- 6. Interesting animals found in the twilight zone
- 8. Deep sea vents found in this zone
- 9. Mini submarines that can withstand great pressure
- 11. High concentrations of this gas from vents
Down
- 1. First portable air tank used by divers
- 2. First British ship to study the ocean floor,
- 3. Coral grows in curving lines that resembles this,
- 5. An underwater mountain
- 7. A method of mapping the ocean floor
- 10. Submersibles that go below 22,000 feet