Quarray eels are large burgundy-colored creatures that live in holes in the side of Ghastly Gorge. They appear in My Little Pony: Friendship is Magic, in the episode, "May the Best Pet Win!". Their name is a play on "moray eels" and "quarry". When Rainbow Dash races through the gorge in this episode, she tells her prospective pets that the eels become agitated when anyone gets too close to their nests. The eels pop their heads out to try to eat the contestants as they pass by.
After Rainbow Dash dodges all of the eels with relative ease, the other animals try to make it through: the bat is almost swallowed by one of the eels, but it manages to escape out of the creature's nostril; the eagle almost has its head bitten off by another eel; the owl uses its wings to keep a third eel from biting down and swallowing it; and the falcon gets its tail feathers bitten by a fourth eel, but it manages to escape the eel's grip.