Survival of the Bluefin Tuna Part 2

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Across
  1. 4. To (make something) become larger in amount or size.
  2. 5. To fall or to allow something to fall.
  3. 7. Physical or mental activity needed to achieve something.
  4. 8. To produce young animals.
  5. 9. The greatest amount, number, or level of something that is either possible or allowed.
Down
  1. 1. The young of an animal, or a person's children.
  2. 2. People or things go somewhere where they cannot be seen or found.
  3. 3. (the study and knowledge of) The practical, especially industrial, use of scientific discoveries.
  4. 6. The fact that something or someone is liked, enjoyed, or supported by many people.