Originally Posted by King of Nines
I've seen that program too, I think it's called Fishzilla (a snakehead fish), fish from hell. Ity was also imported from asia, but found their way into US waterway system and is now becoming huge problem.
I can attest from pretty close and first hand (pun no intended) nasty experience that it is indeed fish from hell.
My uncle who collects exotic animals have four in his pond. One day I was sitting next to it with my flailing hand over the water, and the fishzilla jumped out and bit my hand, I got nasty wound and my hand was bleeding everywhere. At first they were kept in a big aquarium on the second floor, but one jumped out, flew over big window, and landed on the ground below, and NOT DEAD. They are literally devil fish. I'm not exaggerating.
They don't like eating dead meat, so they need to be fed live fish, and preferably catfish (yes, catfish is their favorite snacks) and I've seen them eating it alive ferociously, till all flesh is gone except for the head. Apparently they don't find fish head tasty.
The four fishzilla one day became three, because my cousins forgot to feed them live catfish for a couple of weeks, and when they got hungry, they attacked the smallest one among them and cannibalized their sibling.
Here's how they look like: