Aquarium: several shots of porpoises being fed after an act of porpoises jumping through hoops. FOLLOW SHOT of porpoise with balloon on nose, of porpoise throwing ball up in game of "basketball". Shots of porpoises acting up, jumping out of water, begging for hand outs. Shots of keeper on platform, of porpoise jumping high to retrieve a fish from keeper's hand. Several shots of porpoises showing off, jumping out of water, touching ball with nose, swimming upright in water, doing various tricks. Glimpses of audience now and then. MS of porpoise grabbing towel and trying to pull it out of man's hand. Shot of a porpoise jumping high to touch ball swimming at end of string. FOLLOW SHOT of porpoise swimming on his tail as others congregate around keeper for tidbits.