Across
- 2. eggs develop outside mother's body
- 3. contain guanine crystals
- 4. helps control bouancy
- 5. colored to match surroundings
- 8. born in fresh migrate to salt
- 11. dark top and white belly
- 13. develop inside without nourishment
- 15. process from a new organism from unfertilized egg
- 16. coordinated swimming
- 18. exterior gill cover
- 19. bony fish
Down
- 1. break up outline of fish
- 4. less organized swimming together
- 6. born in freshwater migrate to fresh
- 7. cartilaginous fish
- 9. moves in direction of currents
- 10. develop inside the mothers body
- 12. jawless fish
- 14. protein that gives tuna extra oxygen
- 17. line sensory organ that appears along both sides