Not everyone can have a Patronus that's steeped in romance or a longing for the father they never knew. Some wizards have Patronuses that are steeped in pop culture, awesomely frightening, or just plain silly.
Artist Alicia Braumberger came up with this guid to rare and unusual Patronuses, and the Dementors should beware of some of these anomalies. After all, that mantis shrimp Patronus packs a real punch.
You can also get this image as a print or on a tote bag or pillow through Redbubble.