Officer John is an orange fish. He wears a police uniform which consists of a white and blue suit with a blue police hat and a big star on the front of the suit.
He is very strict about his business and acts as an authority figure towards the characters. However, he and his fellow cops are shown to be unfair, useless and corrupt as they only arrest people for minor things. He is also shown to have mocked SpongeBob for getting the Tattletale Strangler arrested and Squidward for reporting SpongeBob's mess to the authority.
A running gag is that he often reprimends people for no apparent reason and gives them tickets for very little things, mainly littering without even letting the person he reprimended explain.