Pink salmon's battle

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Across
  1. 3. body of rotating water
  2. 4. in the middle of the jouney
  3. 7. to transform
  4. 11. strongest
  5. 12. path,where one chooses to go
  6. 13. sadly,unluckily
Down
  1. 1. a difficult step
  2. 2. the same quantity as
  3. 5. a splitting, also a piece of cutlery
  4. 6. fatigue, tiredness
  5. 7. american unit of length
  6. 8. Offspring, children
  7. 9. level of a building
  8. 10. vertical drop off water