Even Otter pups need to learn how to swim and this video from the Columbus Zoo shows a mother other giving her otter pups a swimming lesson. Audrey is the mother North American River Otter and she gave birth to three male otter pups. When they are around 30 days old the swimming lessons begin. Of course even good swimmers get tired so after the swim lesson the otter pups enjoy a nice nap in their cozy den.