Captain Shaw

He is a fisher who gets money by offering rides on his boat. He has been tracking down the existance of the krakken for years

Ben 10
He makes his first appearance in "the Krakken" where he takes Ben and Max on a fishing trip but they discover the krakken on the way. He is enemies with the "friends of fish" organization as well and in the end of the episode it is unknown what happened to him.