Poisonous Invasive Species You Didn't Know About

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11: Hammerhead Worm
Ecosystems are fragile things. Just one invasive species can upset the whole balance of the different creatures that live there, and in the Southeastern United States, one unique worm is doing just that. This animal, the Hammerhead Worm, starts out quite small, but it’s poisonous and it grows fast. That makes it a threat, and as over 100 people have spotted the creature in different parts of the state of Georgia, there’s a red alert out about the worm. It releases something called a tetrodotoxin, which in high enough concentrations can kill people. And yes, this creature resembles something out of nightmares.

10. Burmese Python
This animal invasion takes place in the Florida Everglades. Local species are being pushed out by a brutal non-native snake species.
This has been happening for decades and sadly, it doesn't show any times of stopping.

9. Cane Toad
The Cane Toad is actually a creature that became an invasive species due to how people felt it would help them solve a problem, not realizing that it would actually exacerbate the problem even further.

8. Asian Tiger Mosquito
Almost everyone agrees that mosquitoes are the worst. But if you want to talk about one that is not just invasive, but deadly in many ways, you need to talk about the scourge that is the Asian Tiger Mosquito. Why does this one make the cut over other species of mosquito? Simple, because it's been ranked the 4th most invasive species in the entire world! And yes, it is a potential danger to other animals, including humans!

7. Emerald Ash Borer
All sorts of insects make their homes within trees. That's not invasive in and of itself. However, when it comes to the Emerald Ash Borer, there’s a different story.

6. Northern Snakehead
Now here’s a creature that looks like something out of a nightmare, but it’s real, and it’s dangerous! There are certain fish species that are menaces in the worst way possible, and the Northern Snakehead, which has encroached in places like Chesapeake Bay, is a great example of that.

5. Brown Marmorated Stink Bug
Sometimes members of an unwanted invasive species aren't going to poison your environment, but rather, poison your nose every time you try to get rid of them. That’s the case with the Brown Marmorated Stink Bug. They are the bane of many homeowners in certain regions because if you try to kill this bug it'll release a stench that will be VERY hard to get rid of because...it's just plain putrid.

4. Zebra Mussel
How's this for a twist? Here’s an invasive species that is poisonous...to the wallets of many around the United States.
The Zebra Mussel, native to Eurasia, came to North America in ship ballast water. They were first detected in the Great Lakes in 1988, and have spread like crazy since then. This is bad for two reasons. One, they disrupt the ecosystem as they try to get food, but the second is that they can be so numerous that they collect in massive numbers and clog up the pipes of sewage systems in major cities

3. Lionfish
The infamous Lionfish is a fish that is venomous on the inside, and destructive on the outside.
If you notice its pointed fins, those are indeed where the venom lies, and as a result, anyone who touches this fish quickly finds themselves in pain and danger. Many have had terrible, painful experiences just from being pricked by one of the lionfish’s fins.

2. Gypsy Moths
Fun fact, if you're spending over $30 million dollars a year trying to get rid of a single species of animal...? You can bet they're a VERY invasive species, and the Gypsy Moth is just that.
These moths are infamous for all sorts of reasons, not the least of which is that they're well-known fire hazards. Additionally, there is the fact that they destroyed the populations of multiple tree and plant species, which also hurts all the animal species that live in the affected ecosystems.

1. Humongous Fungus
In Oregon in the United States, in a place called the Malheur National Forest lives what is technically the largest living organism in the world today, a fungus called Armillaria ostoyae.
If you're curious how this is the largest living organism on Earth, you need to not think about height or width or even length, but rather, the area it covers. Because the roots of this fungus currently covers over 2,385 acres of land (10 sq km) within the Malheur National Forest.
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