Tell me about it! I though it was bad when I lived in CA. Just look at this list:
Mississippi
The following prohibited species may be allowed under a Dept. of Agriculture and Commerce permit process where environmental impact has been assessed:
Fish Species
lampreys (Petromyzontidae)
piranha and pirambebas all species (Serrasalminiae)
banded tetra (Astyanax fasciatus)
Mexican tetra or silvery tetra (Astyanax mexicanus)
tiger characin or trahira (Hoplias malabaricus)
skinny tiger characin or biara (Raphidon vulpinus)
pencil or parasitic catfishes (Trichomycteridae)
airbreathing or walking catfishes (Clariidae)
bony-tongue (Osteoglossidae)
dorados (Salminus)
freshwater stingrays (Potamotrygonidae)
Nile perches (Lates and Luciolates)
African electric catfishes (Malapteruridae)
African tigerfishes (Alestidae/Hydrocyninae)
freshwater electric eels (Electrophoridae)
snakeheads (Channidae)
South American tigerfishes (Erythrinidae)
airsac catfishes (Heteropneustidae)
peacock bass or peacock ciclid (Cichla ocellaris)
South American pike characoids (Acestrorhynchus spp.and Ctenolucious spp.and Luciocharax (Boulengerella) spp.
African pike characoids (Hepsetus spp. and Ichthyboridae,
rhapiodontid characoids (Hydrolycus spp. and Raphiodon (Cynodon) spp.
banded knifefish (Gymnotus carapo)
mud carp, sandhkol carp (Cirrhinus spp. and Thynnichthys spp.)
rudd and roach (Scardinius spp. and Rutilus spp.)
old world breams (Abramis spp., Blicca spp., Megalobrama spp. and Parabramis spp.
old world chubs, ide and dace (Leuciscus spp.)
asps and yellowcheek (Aspius spp., Psedaspius spp., Aspiolucius spp. and Elopichthys spp.)
giant barbs and mahseers (Tor spp., Barbus tor and Barbus hexagonolepis
catla (Catla spp.)
whale catfishes (Cetopsidae)
pike killifish (Belonesox belizanus)
marine stonefishes (Synanceiidae)
ruffes and schraetzers (Gymnocephalus spp.)
zanders (Stizostedion lucioperca, S. volgense (volgensis) and S. marinum
cichlids (Crenicichla spp. and Batachops spp.)
Asian pikehead (Luciocephalus)
Plant Species
hydrilla (Florida elodea) (Hydrilla certicillata)
egeria (African elodea) (Egeria densa)
water hyacinth (Eichhornia crassipes)
rooted hyacinth (Eichhornia azurea)
Eurasian watermilfoil (Myriophyllum spicatum)
water lettuce (Pistia stratiotes)
paperbark (Melaleuca) (Melaleuca quinquenervia)
Invertebrate Species
yabbie lobster (Cherax destructor)
zebra mussel (Dreissena polymorpha)
Tasmanian giant crayfish (Astacopsis spp.)
Dept. of Wildlife, Fisheries and Parks list has not yet been developed, but walking catfish, piranha are prohibited under separate regulation.