Question 11. What parts do fisies use for movement? 12.How do fishes live in water? 13. What do fishes have on their skin?. Answer A. Fisies use their gills io breathe under water B.Fishes have skills, C. They get their body temperature from the surrounding water D.Fishes use their fins to swim E. Fishes lay many eggs at one time. 14.How do fishes have their young? 15. Why fishes are called cold-blooded?​