Now here's a sight you'll rarely see at your local natatorium:
Puddin'
P.S. If you follow the Picture Source link, you'll discover that the tiger's name is Odin and he was six years old when the picture was taken. At the source, you can also enlarge the picture and have a better view.
Here's a Mail story about him with more pictures: Mail Article
Here he is on YouTube: Odin Swimming