There aren't many cat species who swim by their own choice. Tigers are one of them. Sydney's Australia Zoo has a pair of tiger cubs named Spot and Stripe. In this video, tiger expert Giles Clark introduces them to the tiger pool for their first swim. They aren't all that sure about the new concept, but once they are in the water, they are quite at home.
This is a clip from the BBC series Tigers About The House, which follows Clark's effort at hand-raising the rare Sumatran tiger clubs. He has to watch Spot and Stripe constantly, lest they stalk the family dog or get into other tiger business. (via Tastefully Offensive)