In 1859 an 8-year-old Swede by the name of Samuel Nilsson threw the eel into the well. While the act may be reminiscent of children throwing strange objects into toilets in modern times, it was in fact common practice to throw an eel in your well.
Many towns didn't have public water systems until the 1960s, and eels ate the flies and other creepy crawlies, keeping the house's water supply clean .
"Eels normally only live to be seven years old," Kjellman told The Local. "They usually get so fat and their intestinal canals stop working. But this one just lived and lived and lived."
The eel had unusually and disproportionately large eyes - "grotesquely large", Kjellman remarked - due to a lifetime in the dark well, and may have undergone other odd changes as well.
The eel in 1959. Photo: Private