Jigglers

The Jigglers make their first appearance in the episode "The Jiggler". The Mama Jiggler looks the same as her children, only larger. In the episode titled "The Jiggler", Finn and Jake find a Jiggler and take him to their Tree Fort, where they discover its love of dancing. Finn and Jake also discover that the Jiggler likes taking drawings off of paper and eating them. When Jigglers are away from home for too long, they start feeling sick and begin to spew a pink fluid from their holes (which would be considered to be vomiting). They seem to communicate to each other by whistling. Jigglers also seem to be able to communicate using images that they kiss upon surfaces, changing the colors of their lip marks to sort of "pixelate" a larger image. The baby Jiggler, Finn and Jake find, does this after becoming sick and exploding. Showing them that it wants to go back to its mother. After realizing that the mother lives near Stanley's house, they are able to successfully return it.

Appearance
A Jiggler is half blackish-gray and half white on all parts of the body. Fully grown Jigglers can grow taller than the height of a house. When angry or fed specific foods, a Jiggler will flare up and rapidly change colors. There is also juice inside of the Jigglers that they need to live, and the mother uses the juice's scent to tell which babies are hers, likely because they can't make their own scent. The Jiggler that Finn and Jake had "adopted" exploded and stretched all over the place, leaving Finn and Jake covered with a pink liquid.