you are damn lucky, i swear my puffer is satans puffer, it looks so docile and clumsy the way it just swims up to things but then it just bites there fins!
Haha that's exactly how my figure eight puffer was. He had the most innocent look on his face and he'd always look both ways before chomping into something. Miss that fish so much, glad you're keeping him
My leopard puffer, often considered more aggressive than the figure eight, is totally mellow. He even gets chased by the domino who's smaller than him.
The cat frenzies him, though. Might have to lock the cat in the room with a zoanthid colony.