fishes

1234567891011121314151617181920
Across
  1. 4. when a fish had different shading around their body to blend into the sea foam or ocean floor
  2. 6. when the offspring develop inside their parent
  3. 8. when a fish lays eggs outside its body
  4. 9. a mollusk that has 2 hinged parts
  5. 10. the final stage of development for an oyster
  6. 11. a less organized school
  7. 13. an organ that can increase a fish's buoyancy
  8. 15. cartilaginous fishes
  9. 16. there are eggs inside the body that hatch but do not provide nutrition
  10. 17. protective covering over a boney fish's gills
  11. 18. a more organized group of fish that stay together
  12. 19. the act of cleaning and opening a shellfish
  13. 20. larval stage of an oyster
Down
  1. 1. a red protein in a fish's body that gives oxygen to the muscles
  2. 2. when a fish changes color to disorient a predator
  3. 3. a stage when a veliger can move with its foot
  4. 5. Electric sensory gel in a sharks nose
  5. 7. offspring of a shellfish
  6. 12. fish that swim up fiver to spawn
  7. 14. the line along the back of a fish that senses water displacement