Two chimpanzees at the Twycross Zoo are completely hairless due to suffering from alopecia. Screenshot: Newsflare
The chimpanzees, which the filmer indicated are brothers, were filmed chasing and hitting each other.
The fight between the two naked apes leads the rest of the enclosure's chimps, which appear to have retained their hair, to join in the chaos.
The uploader said none of the chimpanzees appeared to be seriously injured in the fracas.
"A few scratches and some minor wounds and probably a few more scars," the video's description reads.
Alopecia, a condition that can also affect humans, has been known to affect chimpanzees that suffered from stress or trauma.
