Tens of millions of "freed" goldfish are thought to inhabit the Great Lakes.
From cane toads to kudzu, invasive species (sometimes called alien species) are those that aren't native to an ecosystem and that cause harm to native species, local economies or humans. Invasive species can be terrestrial species, like the pythons invading Florida's Everglades, marine, like the lionfish invading Caribbean waters, or pathogens. Invasive species can cause harm by out-competing native species, or preying on them. They can sometimes increase fire risks or contribute to erosion. Some invasive species have been introduced accidentally and others, like kudzu, were introduced on purpose and then spread more widely than originally intended. Invasive species are found in every type of habitat and are typically difficult to eradicate. Read more about invasive species around the globe and efforts to stop their spread.
Lionfish are known for their breathtaking beauty, venomous sting and relentless invasion of tropical waters far from their native habitat.
The hybrids could harbor more robust genes that allow them to adapt to various types of environments.
A species of tiny, adorable marsupial that scientists thought had been extinct for more than 100 years has re-emerged in New South Wales, Australia.
Video reveals the invasive lionfish has reached the ocean's twilight zone. There lionfish are threatening local fish species, including ones that science has yet to discover.
A Burmese python treated the Florida Everglades like an all-you-can-eat buffet after it ate three deer in a mere three months, a new study finds.
A Burmese python in the Everglades with a penchant for venison gulped down three whole deer — one doe and two fawns — before wildlife officials captured and euthanized it, a new study reveals.
A species of ant found in Ethiopia may have some of the key behaviors needed to form an invasive supercolony, research suggests.
The company that makes Roomba vacuums, iRobot, is creating a robot to target and kill invasive lionfish.
A South American fish with uncannily human-like chompers has been unexpectedly showing up on Michigan anglers' hooks.
The first wave of a lionfish invasion has struck in the Mediterranean, a region where the animals had not been established before.
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