Aquatic biomes crossword puzzle

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Across
  1. 2. A type of swamp made up of wetland and dead plants
  2. 5. Harmful chemicals that negatively effects our ocean and our health
  3. 7. wet, muddy land caused by flooding from salt water
  4. 10. 2nd largest river in America
  5. 11. Too much of this can cause a decrease of marine life in the ocean
  6. 13. When river water and seawater mix
  7. 14. When little water reaches Earth's land
  8. 15. Brown algae
  9. 16. Organisms that live in the sea
  10. 17. Sand and saltwater are found here
  11. 18. Layer of the ocean that doesn't get sunlight
  12. 19. Where the North Sea and Great Britain meet
Down
  1. 1. Layer of the ocean that gets sunlight
  2. 3. Excess water that could potentially be polluted
  3. 4. Cleans dirty water
  4. 6. When a lot of water reaches Earth's land
  5. 8. 4th largest lake in America
  6. 9. Deep trench found at the bottom of the Pacific Ocean
  7. 12. Water that is not salty
  8. 17. A mix of fresh and saltwater