Merdlidops are sinkhole-dwelling creatures from the planet Koozebane. Hot-pink and furry with hollow socket eyes atop a cone-shaped head, they assumingly assimilate other creatures, or at least humans, into their species as evidenced on episode 211 of The Muppet Show. The aliens were performed (in order of appearance) by Frank Oz, Jerry Nelson, Richard Hunt, and Dave Goelz. A Merdlidop named Phyllis, who had a balloon-like nose, appeared in the "At the Dance" segment from episode 220.