Sea animals: how to train walrus. Video made in the zoo

It is always nice to see something unexpectedly interesting. We noteiced that a big walrus was doing strange things, and then saw a man feeding him with fish. So we stopped to make a short video about it. The trainer has a hypersonic whistle, so that we, humans don t hear it, but the sea animals do. It is used to train walruses, dolphins or sea lions.