I really and truly wasn't swayed by Finding Nemo. I've loved clown fish for a looooong time! (I bought a stuffed clown a few years and named him Emitt- there was a hobo clown named Emitt.... so no Nemo!!) Seeing the moving finally kicked my butt into gear for starting my own tank.
Close second would be a tie between Mandrian Fish and Puffers (remember seeing one in LFS
that had such pretty glittery blue eyes!)
Marlin: Okay, a mollusk walks up to this sea cucumber, well he doesn't actually walk, he's just there, and he turns to the sea cucumber, and... Well, wait, there's a mollusk and a sea cucumber and...
Chum: You know for a clown fish, he's not that funny.