The fish have lungs
.In the era of great volume and hemorrhoids. About 400 million years ago. The fish that used to breathing through the gums, which live in the sea, have migrated to live in fresh water sources, which in some seasons the water in the arid River swamp swamp? Some fish, so they develop themselves. With oxygen from the air the lungs can hold. However, fish have lungs, they were extinct for a long time.
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