Aquatic Giants

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Across
  1. 2. – The "sea cow"
  2. 5. – Longest-legged crustacean
  3. 6. – Round and massive
  4. 9. – Gentle giant filter-feeder
  5. 10. – Famous for singing
  6. 12. – Black-and-white predator
  7. 15. – Enormous blubbery mammal
Down
  1. 1. – Huge but harmless
  2. 3. – Deep-diving squid hunter
  3. 4. – Apex ocean predator
  4. 7. – Tusked unicorn of the sea
  5. 8. – Largest sea turtle
  6. 11. – Graceful ocean flyer
  7. 13. – Largest animal on Earth
  8. 14. – White Arctic swimmer