Chordates and fishes
Across
- 2. covers or closes aperture
- 3. small & transparent
- 6. teeth-like scales
- 9. release of excretory
- 13. top chamber of heart
- 14. sensory organs
- 15. fin on back
- 16. skeletal rod
- 17. bottom chamber of heart
- 18. deep-bodied
- 19. bottom-dwelling
- 20. fish having fleshy lobed fins
Down
- 1. helps control direction
- 4. two short siphons
- 5. cold-blooded
- 7. rasping tongue
- 8. helps keep fishes depth
- 10. tail fin
- 11. fish having thin fins
- 12. similar to stingray