Think Of The Fish
This zoo allows smoking which is strange, but what’s even weirder is that people would litter their cigarette butts in an area surrounded by animals. So, instead of just putting up a no smoking or no littering sign, they decided to try a more comical approach.
Informing people that the fish have taken up smoking because of someone else’s bad habits might get a chuckle out of people. This sign might make them less inclined to drop their butts on the ground.