I found this on the Wikipedia website under "Walking Catfish" , Clarius Batrachus
.
(BTW: This is one of the arguments used by the proponents of
HR 699)
As invasive species
In the
United States it is a nonindigenous invasive species, which is now established in
Florida and reported in
California,
Connecticut,
Georgia,
Massachusetts, and
Nevada.
The walking catfish was imported to Florida, reportedly from Thailand, in the early 1960s for the aquarium trade.
[2] The first introductions apparently occurred in the mid-1960s when adult
fish imported as brood stock escaped, either from a fish farm in northeastern Broward County or from a truck transporting brood fish between Dade and Broward counties. Additional introductions in Florida, supposedly purposeful releases, were made by fish farmers in the
Tampa Bay area,
Hillsborough County in late 1967 or early 1968, after the state banned the importation and possession of walking catfish. Aquarium releases likely are responsible for introductions in other states. Dill and Cordone (1997) reported that this species has been sold by tropical fish dealers in California for some time. They have also been spotted in the midwest a couple of times.
In Florida, walking catfish are known to have invaded aquaculture farms, entering ponds where these predators prey on fish stocks. In response, fish farmers have had to erect fences to protect ponds. Authorities have also created laws that banned possession of walking catfish.