Phineas and Ferb (2007)

S1E30 Voyage to the Bottom of Buford

Title: Expedition to the Depths of Buford Plot: Buford is distraught after his beloved goldfish disappears, prompting the boys to embark on a sea adventure to locate it. Concurrently, Dr. Doofenshmirtz is on a mission to eliminate a recording of his dubious heroics involving a kitten stuck in a tree.