Across
- 4. This helps bony fish maintain buoyancy
- 6. Diamond shaped scales
- 7. These creatures look like rays except they have a dorsal fin on their tails
- 9. Some chondrichthyes lay eggs with a thick leathery protection over top
- 10. Smooth circular scales on bony fish
- 12. This class of creatures do not possess a true jaw
Down
- 1. This creature has a modified swim bladder that acts as a lung
- 2. Skeletal structures of creatures found in class Chondrichthyes
- 3. These type of fish have two rows of teeth
- 4. Circulatory system that all fish have
- 5. Part of the brain that helps interpret smell
- 8. Chondrichthyes use this organ to maintain buoyancy
- 11. Anatomical position for the back