Does a Sloth Sink or Swim?

YouTube Description:

Crazy Swimming Sloths. Some nice people try and do a couple sloths a favor and pull them out of the water, taking them to land. Should sloths be in the water swimming and if you see a sloth floating around should you help it?
lucky760says...

That's awesome. In several million years they may become exclusively water dwellers, similarly to how dolphins and whales evolved from pig-like and cow-like creatures.

Except the sea-sloths will have huge claws at the ends of their fins.

[edit]
Actually, it seems there were species of sea-sloths evolving through history, with their snout growing longer with a raised breathing hole. I guess evolution proved them too slow to survive in the water, as they all went extinct and left the ground-based species to carry on their good name.

See also: The Giant Swimming Sloths of South America

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