How do you defeat the dolphins in the marine park in the simpsons game

There are heaps of ways. Like just punching them but that takes for a long time so for an easier way get Lisa to play her thingy-me-bob to control most of the dolphins then defeat the controlled dolphins at the end or control then defeat sorry this was long i better stop before it gets bigger...opps just did. ok im going to stop in 3...2...1...NOW!