Phineas and Ferb - Season 3 - Eps 6: The Belly of the Beast
For Harbor Days Festival, Phineas and Ferb celebrate by creating a mechanical version of the historical elusive shark of Danville Harbor. Seeing what the boys are up to, Candace enlists some help to capture the mysterious shark. Meanwhile, Dr. Doofenshmirtz invents the 'Salt Water Taffy-inator' to give cavities to every kid in the Tri-State Area.
About Phineas and Ferb

Title: Phineas and Ferb
First Air Date: 2007-08-17
Last Air Date: 2015-06-12
Status: Returning Series
Rating: 7.873/10 (from 887 votes)
Language: EN
Seasons: 6
Total Episodes: 235
Network: Disney Channel
Genres: Animation, Comedy, Family, Sci-Fi & Fantasy
Production Companies: Disney Television Animation
Synopsis
Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace, who tries to bust them. Meanwhile, their pet platypus plots against evil Dr. Doofenshmirtz.
Cast

Vincent Martella
Phineas Flynn (voice)

David Errigo Jr.
Ferb Fletcher (voice)

Ashley Tisdale
Candace Flynn (voice)

Caroline Rhea
Linda Flynn-Fletcher (voice)

Dee Bradley Baker
Perry the Platypus (voice)

Alyson Stoner
Isabella Garcia-Shapiro (voice)

Dan Povenmire
Heinz Doofenshmirtz (voice)

Jeff 'Swampy' Marsh
Francis Monogram (voice)