Aquatics Recap

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Across
  1. 2. The boney fish family
  2. 3. The kind of filtration which contains good bacteria involved in the nitrogen cycle
  3. 5. A by-product of fish waste and uneaten food
  4. 7. A glass box under a fish tank which contains filtration
  5. 8. A mixture of fresh and salt water
  6. 10. Sharks have this instead of bones
Down
  1. 1. Sharks and rays
  2. 4. Snakelike fishes with smooth slimy usually scaleless skin, a member of the jawless fish family
  3. 6. The final stage of the nitrogen cycle, this should be increasing with everything else at 0
  4. 9. Fish use these to extract oxygen from water