How does this Chinese magician control these fishies??

Chinese magician Fu Yandong is under fire from Animal rights activists for a trick where he "controls" the six gold fish by simply waving his hands above them and having them do various formations. The Animal rights activist said that "Fu had likely fed the fish magnets--or implanted them in the fish--so they could be dragged around their tank from underneath"

Fu Yandong was suppose to appear on television again to repeat the trick and reveal his secret, but that ended up being canceled.

So now we'll never know....So how is he doing this???? [Boing Boing]