crossword

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Across
  1. 3. not native to an area, usually introduced from another ecosystem or country
  2. 4. Places where fish are caught for sale.
  3. 6. disappearance of a species
  4. 8. Harmful substances released into the environment
  5. 9. Farming of fish or shellfish.
Down
  1. 1. the cultivation of fish and other marine life for food – a type of aquaculture
  2. 2. the variety of living organisms and the environments they form
  3. 5. Farming and raising animals for food.
  4. 7. Relating to the land next to the sea.