Why are sharks classified as fish?

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2016-12-14 12:25:24
2016-12-14 12:25:24

I believe that sharks are classified as fish because they breath underwater through gills. Anything that has gills is a fish even if a lion has gills and it never goes in the water it's considered as a fish.
Sharks are considered fish because they live under water and use gills to breathe. On top of that, they use fins and not flippers to swim.

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