Sea crossword

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Across
  1. 2. its a fish you can eat raw
  2. 4. predator with sharp teeth
  3. 6. a creature that contains pearls
  4. 7. a rare item in the sea used in jewellery
  5. 8. Reefs
  6. 10. underwater vehicle just imploded last year
Down
  1. 1. bones millions of years old
  2. 2. large group of fish
  3. 3. yellow Grain
  4. 5. very small usual prey for basking whale
  5. 7. people who steal and plunder
  6. 9. defends the sea