Across
- 3. A hard outer shell
- 7. invertebrate group with starfish
- 8. What you call an internal skeleton
- 9. Do not have a spinal column
- 11. Invertebrate group with sponges
- 13. Most have four limbs and are covered in fur
Down
- 1. invertebrate group with snails
- 2. invertebrate group with flies
- 4. Have an internal skeleton and spinal column
- 5. Covered with feathers and have two wings and a beak
- 6. Have skin covered with hard scales and breathe through lungs
- 10. Invertebrate group with jellyfish
- 12. Aquatic and have scales