You Tube Link
Olivia Riley enjoys fishing for catfish in Kansas City's Troost Lake. On Saturday, however, she caught something a little more unusual than a catfish.Instead of coming up with a catfish, Riley captured the biggest goldfish she's ever seen."
I don't know, it's beautiful!" Riley shouted as she smiled and showed her massive catch to a friend's camera.
Riley did throw the beautiful goldfish back.
Link
Clearly it's a Magikarp!
http://en.wikipedia.org/wiki/Goldfish#Size
In fact, goldfishes are closely related to carps. Koi carps are simply naturally mutated (and selected) regular carps (and would quickly breed into normal brown carps in wilderness). Same story with goldfishes.
But true, this videos looks fake
It is a pretty fish that she caught though. Hopefully it didn't get too damaged by the hook.
She had a bobber, meaning she wasn't using a moving lure. It is damn near impossible to hook a fish on the back when fishing with a bobber.
Not saying it is defiantly fake, stranger things have happened. But if I had to guess it would be fake.