Dinosaurs puzzle

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Across
  1. 4. a time period
  2. 6. used to be called the unicorn of dinosaurs
  3. 7. was the biggest meat eating dinosaur
  4. 9. apex predator that lived in shallow seas
  5. 12. hardest biting fish dinosaur
  6. 13. smallest arms
  7. 15. was 30 feet long
  8. 16. a land and water dinosaur
  9. 18. only lived in water
  10. 19. only meat eating
  11. 20. lived in water now extinct
  12. 21. had armor like body
Down
  1. 1. eats meat and plants
  2. 2. dead and extinct
  3. 3. the fastest dinosaur
  4. 5. a time period
  5. 8. was large weighted abt 100 tons
  6. 10. had a bonie back
  7. 11. a time period
  8. 14. only plant eating
  9. 17. had feathers like a bird
  10. 18. rex was a meat eating carnivore