water areas / general

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Across
  1. 5. animals that live freely in the nature
  2. 6. a long water channel usually located at the side of a road
  3. 7. occurring naturally in a particular place; native
  4. 9. regular rise and fall of sea level
  5. 11. place where water is falling naturally from a high place such as a cliff
  6. 12. a small river
Down
  1. 1. a piece of land that is almost entirely surrounded by water
  2. 2. situation in which a certain specie stops existing
  3. 3. a large frozen area
  4. 4. area that contains a chain or group of islands
  5. 8. area, where all the species living there are protected
  6. 10. wetlands that form as rivers empty their water