Across
- 4. eggs that are hatched
- 5. developed inside mothers body
- 7. special sensing organs
- 8. group of fish that swim together
- 9. fresh>salt>fresh
- 13. disguises an animal's shape
- 14. darker on the upper & lighter under
- 17. eggs are hatched in the body
- 18. hinged shell
- 19. cartilaginous skeleton
Down
- 1. gas-filled organ
- 2. camouflage breaks up the outlines
- 3. technical term for gill cover
- 6. salt>fresh>salt
- 10. tool used to open oysters
- 11. valve's beak
- 12. used to detect movement & vibration
- 15. bone skeleton
- 16. a large number of fish swimming together