Across
- 3. creature with eyes on tenetacles
- 5. A tough elastic substance
- 7. help in keeping direction
- 10. Bladder special structure of the fish
- 11. moved in a zig zag way to push the fish front
- 12. a force that stops an object from moving
- 15. A germanscientist who disscuessed x rays
- 16. The type of movement in snail
- 17. on their tip tentacles
Down
- 1. insect with hard outer skeleton
- 2. Animal which do not have limbs
- 4. photograph of the injured part
- 6. the ability to move from one place to another
- 8. thick and slippery liquid
- 9. joint provides back and forth movement
- 10. Fish which has no bones
- 13. special body shape of fish
- 14. snails muscular organ