Invasive species are all over the place, largely because of human activities. But one entrepreneur has figured out a way to reduce the number of one type of invasive fish by turning it into pet treats ...

In Mexico, fishermen call them "devil fish." They came from Brazil about 20 years ago and have now overrun lakes and rivers across North America. Most millionaires don't consider themselves wealthy.

In another alarm of nature spiraling to hell in Florida, scientists suspect global warming has enabled devil fish to plague and ravage the St. Johns River. This summer, a team of state water and ...