I actually read about this it's so Kwl the owner puts the money in the back pack and the penguin goes to fetch the fish and pays for it! the people have gotten used to it so the pics I've seen show a penguin walk into a fish market and everyone in the store is like not a single duck is given this day
"Oh cool a penguin!"
"Is that a backpack?"
*gets kidnapped and raped by tentacles*