Crustaceans

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Across
  1. 1. having no backbone
  2. 3. used to breathe
  3. 4. 1st stage of life cycle
  4. 5. can live up to how many years
  5. 8. the largest phylum in the animal kingdom
  6. 9. main habitat of crustaceans
  7. 10. a prominent allergen
Down
  1. 2. a hard outer shell
  2. 6. latin word for shell
  3. 7. can be eaten as a good source of ___