Fish

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Across
  1. 10. egg hatches inside the mother and she gives birth
  2. 11. fish with this body shape are bottom dwellers
  3. 12. migrates from the sea to the river to spawn
  4. 13. this organ is very oily and helps sharks to stay buoyant in the water
  5. 15. gill slits of rays ad skates located on the _____ side of their body
  6. 17. senses vibrations in the water
  7. 18. this fish creates a lot of slime to escape from predators
Down
  1. 1. nerve receptors in the snout that detect electrical fields of other organisms
  2. 2. developing embryos absorb nutrients from the mother; live birth
  3. 3. breathing holes on sharks and rays behind the eyes that help to pump water over the gills
  4. 4. class that sharks, rays, and skates belong to
  5. 5. type of scales sharks have
  6. 6. this tall and thin body shape helps fish move among plants and narrow surfaces
  7. 7. stream lined torpedo shape that helps the fish move rapidly through the water
  8. 8. lay eggs outside of the body
  9. 9. what a shark's skeleton is made of
  10. 14. must rely on an external source of heat to regulate body temperature
  11. 16. class of jawless fish