Can a species be "evil"?

Ah, the giant snakehead fish. When an invasive species becomes the subject of a SciFi Channel horror movie (or two), you know it's got a bad reputation.

But truth be told, the Asian snakehead, which is slowly invading bodies of water around the world, just may deserve that bad reputation.

It's a voracious eater, and once it lands in a pond or lake, it's likely to eat every other living creature in its path.

Once it's done eating, the snakehead has a nasty habit of getting up, walking out of its pond onto dry land, and finding its way to its next water-based buffet.

Oh, and it apparently has been known to attack and even kill people who get too close to its young.

Yes, the giant snakehead is nasty, and tough, and resilient, and a danger to just about every other type of fish or wildlife it encounters. But is it "the world's most evil fish," as Environmental Graffiti recently called it?

Probably not, but some species of snakehead are definitely apex predators. And as invasive species, they're about as bad as they come. But as Practical Fishkeeping reports, snakeheads are unlikely to survive in cold waters (a giant snakehead was recently spotted in the UK for the first time), and many countries legislate their import. Besides, snakeheads are popular as food in many parts of the world, so if they ever get too bad here in the U.S., we could always start eating them.

Still, I'd hate to come across one of these guys in a dark alley.

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