Phineas And Ferb: Season 3, Episode 6

3 - 6:

The Belly of the Beast-Phineas and Ferb create a giant mechanical shark at the Harbor Day festival, but Candace and Stacy, with the help of a sailor, go out to catch them at sea. Doofenshmirtz tries to use a large amount of saltwater taffy to give kids all over the world cavities. Moon Farm-Phineas, Ferb, and their friends decide to milk cows on the moon to make better tasting ice cream. Doofenshmirtz uses his Moisture-Suck-Inator to dry out his neighbor's plants when he is jealous of his beautiful garden which he can't seem to grow for himself.