Aggie and the Professor

An Aggie comes across a professor who is staring intently into a fish tank. The Aggie says, "Professor, what are you doing?" The professor answers, "I'm attempting mental telepathy with this fish. You see, if my mind is stronger than theirs, I can control their thoughts. How about you try it!" The Aggie, confident of his ability to successfully control the fish, stares into the tank for a few seconds. Then, all of the sudden, his eyes start bugging and his mouth makes a little 'o' shape like he's pushing water through his gills.