>>58848180A rat king. When rats get nervous, they like to sometimes wrap their tails together like "holding hands", but in some cases when there's too many rats in one place, they accidentally knot their tails together permanently.
That's the leading theory, anyway, I don't think anyone's seen it happen in-person.
Still ended up becoming inspiration for a bunch of mythological shit anyway.
>>58848044Maushold is already a family-friendly version of this since they lock their tails together, and Population Bomb is an extreme example.