If you've visited the New Balance Foundation Marine Mammal Center recently, you've seen Leu, our young rescued fur seal, porpoising through the water with fluid grace, frolicking on the rocks and sending balls zipping across the deck with a quick flick of his flipper. Leu definitely has some moves!

But Leu didn't come to the Aquarium with his fancy flipper work. As you can see in this video, Kathy is working patiently with Leu to develop those skills. And like most of us, Leu had to do a lot of practicing before he started looking like he could take the field with the Revolution.