 Director Wolfgang Gewalt drew similarly vehement criticism for leading an expedition to supply the zoo with a white whale.In the summer of 2004, the beluga Ferdinand and the Commerson's dolphin Yogi, the last animals of their kind in Duisburg, were flown to SeaWorld in San Diego, California, where they are spending their twilight years in species-appropriate tanks with their others of their kind.Amazingly, the animals, which are the oldest of their kind known, appear to have tolerated the move well.