Invasive fish species wreak havoc on native ecosystems, causing irreversible damage to biodiversity and local economies. This video highlights five of the worst invasive fish that have spread ...

Warming ocean temperatures can have similar effects. In the US, the European green crab is among the highest profile invasive species, having caused significant ecological damage along the East Coast ...

Obviously, there is a gradient in how impactful an invasive species is. For example, brown anoles and Burmese pythons vary greatly in the amount of damage they cause but share the same designation ...

For example, non-native trout that have been stocked in historically fish-less lakes in western North America have caused declines in native frogs that have evolved without pressure to adapt to ...