Terroroo

The terroroo (Macropus horribilia) is a marsupial living in the sparsely-populated Australian Outback, closely related to the kangaroo. They share a close common ancestor with the now-extinct Aquatic Saharan Kangaroo. It has been known to cause nightmares to explorers, children, and even little baby terroroos. The collective noun for a group of terroroos is “Aaaaaaa!”

As Pets
The terroroo is often kept as pets by people consider themselves brave. The owners of terroroos often have been found running away from their house screaming in the middle of the night.

A notable terroroo owner is Terrence X. Pseudonym. While being tormented in his sleep by the terroroo, he got into a boxing match and knocked it out the window. He is known as being the only terroroo owner to survive the terorroo. He later adopted an Aaaaaaa! of terroroo but eventually sold them to a terrorzoo.