NOAA
Noaa: Lionfish Discovery Story
The National Ocean Service Education Association has put together this well supported set of articles outlining the cause and resulting effects of invasive species, primarily the Lionfish. This link begins with looking at the story of...
Other
The Lionfish Info Sheet: Captive Care and Home Husbandry
This exhaustive look at the Lionfish provides an amazing amount of information on it's characteristics, habitat and much more. References and many colorful images are provided as well.
University of Florida
Florida Museum of Natural History: Pterois Volitans: Red Lionfish
The Florida Museum of Natural History presents this informative article on the Red Lionfish which is native to reef habitats of the Indo-Pacific. General information including photographs and a habitat map.