Across
- 3. cold-blooded with no arms or legs
- 4. three body parts and six legs
- 5. cold-blooded with moist, scaleless skin
- 6. have spiny skin and can regenerate
- 8. fins and a lateral line
- 9. tentacles with stinging cells
- 11. warm-blooded, most complex creature
- 12. feathers, air sac and wings
Down
- 1. smallest living things on earth
- 2. exoskeleton with eight walking legs
- 7. soft body covered by a shell
- 8. eukaryotic, reproduce by spores
- 10. eight jointed legs