Hydrosphere

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Across
  1. 3. — Small crustacean living in water
  2. 4. — Amphibian living near water
  3. 8. — Hard protective covering of marine animals
  4. 10. — Island group north of Sicily
  5. 14. — Saltwater covering most of the Earth
  6. 16. — The sea itself
  7. 17. — Soft-bodied sea animal
  8. 19. — Aquatic plant-like organisms
  9. 20. — Reef-building marine organism
Down
  1. 1. — Movement on the surface of water
  2. 2. — Intelligent marine mammal
  3. 5. - A marine mammal known for its size
  4. 6. — Microscopic aquatic organisms
  5. 7. — Predatory fish
  6. 8. — Soft marine animal
  7. 9. — Large migratory fish common in the Mediterranean
  8. 11. — Frozen water
  9. 12. — Large body of salt water
  10. 13. — Coastal inlet
  11. 15. — Flowing natural watercourse
  12. 18. — A still body of freshwater