From the killer fish that can live on dry land to the thousand-pound wild pigs with teeth to match, here are nine of the most terrifying invasive species that are threatening American wildlife–and humans.

As pest-infested ships from distant lands pull into port and uncaring pet owners release their imported animals into the wild, a number of invasive species have made their escape onto American soil. With their hefty appetites, aggressive natures, and will to survive, many of these truly frightening animals are driving our native species nearly to the point of extinction.

Without their natural predators, these invasive species are free to thrive in their newfound environment–and wreak havoc. These are nine of the most alarming invasive species that are putting our habitats, our wildlife, and sometimes even ourselves in danger…

Hayley Virgil
Hayley Virgil is a writer, literature enthusiast, and adventurer. When she isn't out exploring for a story to capture, she can often be found hunched over her computer monitor in a dimly lit room.
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