The Catholic church once wanted you to eat beaver so bad, that they classified it as a fish. This made many 17th century women very happy. People who liked to eat a bit of meat however, would have to wait until Saturday to get their jollies.
Modern Jesus tries to persuade some fishermen to lay down their poles and follow him. Apparently they are infidel fishermen.
Finally a use for those stupid fish: annoying Christians.
Christianity: Don’t take the bait!
Give him back that Filet-o-Fish! 5000 of them.