Woman horrified after two-inch goldfish grows into 'monster' and eats tank mates

mirror.co.uk:

A horrified woman says a two-inch long goldfish she won at a carnival has now grown into a huge flesh-eating monster. Alexandria Miller, 28, brought Gerald the goldfish home in July 2018 when he was just a guppy.

She thought her new pet was a standard size, but says he just kept growing and now measures a whopping 12 inches. Now Alexandria, from Chicago, USA, says she has to keep him isolated from other fish as he has eaten several of his tank mates.

He has already outgrown two of his tanks, costing her £1,000 ($1,300) to replace. "When I first got him, he was in a plastic bag and was just under two inches," Alexandria said. "He just looked like your regular goldfish and I thought they grew to their environment so I was expecting him to