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