"...and tiny little ears, a bit like a hippo's Daddy says, only purple and hairy. And if you want to call them, you have to hum;they perfer a waltz, nothing too fast-" -Luna explaining the Crumple-Horned Snorkack to Dean Thomas
Luna belives in many things (see Personal Beliefs) but one of the best-known things are the Crumple-Horned Snorkacks. Luna and her father, Xenophilius Lovegood, both share their belief in this creature, as it is in almost every issue of The Quibbler.
Many witches and wizards don't believe in the Crumple-Horned Snorkack, and ridicule Luna and her father about it, but that doesn't stop the Lovegoods. With all the money Xenophilius makes from the issue of the Quibbler when Harry's interview is featured, she and her father plan to go looking for the Crumple-Horned Snorkack together.