An invasive species, also known as an exotic or nuisance species, is an organism or plant that is introduced into a new environment, where it is not native

In less than a decade, the Indo-Pacific lionfish (Pterois volitans) has become widely established along the Southeast U.S. and Caribbean. Lionfish are capable of permanently impacting economically important species (e.g., snapper and grouper) and may hamper coral reef conservation measures.

Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.

Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. This can result in huge economic impacts and fundamental disruptions of coastal and Great Lakes ecosystems.

For more information:
Learn more about invasive lionfish from NOAA's Center for Coastal Fisheries and Habitat Research

National Centers for Coastal Ocean Science
Episode 14 (Making Waves podcast, 1.30.09)
Invasive Lionfish
Zebra Mussel
Aquatic Invasive Species