To be fair, he did mention the fish that he might be able to go after. Besides, that wasn't his rule; that was the wardens'. He was well aware of the fact that carnivores ate other animals. He was merely preventing him from being punished for it.
"A god? It seems to be a common thing that someone wants to destroy everything."
He was probably one of the strangest humans for the fact that almost immediately after meeting him, he was walking with and talking to a lion like it was something that he normally did every day.
"That's about the age several of my teammates started fighting. I'm Trowa by the way."