Sea Flora

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Across
  1. 3. Relative of crab.
  2. 5. Green in a sea-slug's burger.
  3. 7. Japanese tidal wave.
  4. 9. Ocean's Unicorn.
  5. 11. Type of a coral reef.
  6. 12. Deepest ocean point
Down
  1. 1. Barren Island.
  2. 2. Single-celled algae.
  3. 4. A shark follower.
  4. 6. An island of Australia.
  5. 8. Measure for ocean depth.
  6. 10. The largest fish.