Several trainers work with dolphins simultaneously during the show, but usually only swims with them.
From the aquarium's Web site: Dolphins' curious behavior has convinced many people that they are very intelligent. When in aquariums and zoos, they quickly learn behaviors; they appear to be healthier when they are presented with games and tasks to perform. Although trainers rate their intelligence as equal to that of smart dogs, scientists disagree as to exactly how "smart" dolphins are. Until scientists devise a way to measure intelligence, this shall remain a mystery.
