 Clockbug

The clockbug, or eupcaccia, is a fictional insect created by Japanese writer Kōbō Abe that features in his novel, "The Ark Sakura".The clockbug is an insect species whose legs have atrophied, mobility being unnecessary for its existence since it lives by consuming its own feces, merely using its antennae to rotate in a counter-clockwise fashion, continuously manifesting a circular trail of excretion and ingestion.