Sloth evolution

My animal is a Sloth and he will evolve from living in the forest to living in the water. My sloth will start off living in the forest. After a while, the sloth will start to move around, getting to new places. He will realize there is a nice spot near water. After he will see it is nice by water. Sloths are great swimmers, so the sloth will go to swim more often. When the sloth has a baby, it will be used to the water, which will lead to it breathing underwater.