Ocean zones

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Across
  1. 5. Deepest part of ocean
  2. 6. 4th zone
  3. 7. salt
  4. 8. 2nd zone
Down
  1. 1. sunlight
  2. 2. deep sea
  3. 3. 3rd zone
  4. 4. Mid
  5. 6. glow
  6. 7. First zone