Across
- 3. two shells connected with hatch
- 4. bony fish
- 8. eggs hatch outside the mother
- 11. Belly looks like sky, back looks like dark ocean
- 12. fish gather together for survival, not education like us
- 14. gas filled body cavity to help float fish better
- 15. sheet of tissue that enfolds the rest of mollusk body
- 16. aquatic bugs
- 18. sharks and other animals with cartilage skeleton
- 19. jawless fish
- 20. born in salt, live in fresh, breed in salt
Down
- 1. eggs hatch inside mother
- 2. camo to disguise apperance
- 5. sensory organs in aquatic vertebrates
- 6. eggs develop inside mother
- 7. camo that breaks up lines of fish
- 9. similar to school of fish
- 10. bony flap covering gills
- 13. protein that binds oxygen
- 17. born in fresh, live in salt, then breed in fresh