Chomper and Thud...although I voted for Thud. :blink:
Maybe after reading about him and having seen him in the series, he's grown on me (Thud, I mean.)
P.S. I, too, support the idea of Rinkus and Sierra being fisheaters. Their teeth and beaks were made for it, buuuut, again it's one of those things we fans will have to speculate on. You could argue that Petrie's beak is also suited for catching fish, yet he's clearly a leaf-eater. He doesn't have teeth jutting out of his mouth (we see his teeth sometimes, but they're not sharp.) Still, Rinkus and Sierra have the teeth and all... XD I just choose to think of them as eating fish.