Alert System User Statistics



Total Users
996

StateSubscribers
California200
Florida198
New York197
Oregon186
Washington182
Pennsylvania182
Michigan172
Texas169
Idaho167
Wisconsin165
Minnesota159
Ohio158
Illinois157
Louisiana157
Nevada152
Indiana149
Alabama148
Maryland146
Montana146
Mississippi145
Georgia144
Colorado143
North Carolina143
Virginia143
Wyoming142
Massachusetts141
New Jersey139
New Hampshire137
Utah136
Maine136
Vermont134
Connecticut133
South Carolina133
Delaware131
Alaska131
Arizona131
Tennessee131
Missouri129
West virginia129
Kansas128
Arkansas128
Iowa128
Oklahoma126
Rhode Island125
New Mexico122
Kentucky122
North Dakota118
Hawaii118
South Dakota117
Nebraska115
District of Columbia114
Puerto Rico95
GroupSubscribers
Fishes347
Marine Fishes294
Mollusks-Bivalves287
Mollusks-Gastropods241
Crustaceans-Crayfish240
Amphibians-Frogs205
Crustaceans-Crabs199
Plants197
Mammals197
Reptiles-Turtles195
Reptiles-Snakes194
Amphibians-Salamanders188
Crustaceans-Shrimp183
Mollusks-Cephalopods173
Reptiles-Crocodilians164
Crustaceans-Copepods160
Crustaceans-Amphipods158
Crustaceans-Isopods153
Crustaceans-Cladocerans153
Reptiles-Lizards151
Crustaceans-Mysids146
Crustaceans-Barnacles123
Coelenterates-Hydrozoans120
Annelids-Oligochaetes118
Entoprocts109
Coelenterates-Scyphozoan90
Bryozoans75
Mollusks-Nudibranchs67
Rotifers64
Coelenterates-Anthozoan61
Crustaceans-Lobsters57
Tunicates56
Sponges56
Annelids-Hirundinea54
Crustaceans-Ostracods52
Algae51
Annelids-Polychaetes50
Ectoprocts47
Platyhelminthes44
Cumaceans43
Amphibians-Caecilians43
Polyplacophors43
Nebaliaceans43
Nematodes11
Birds6
SpeciesNameSubscribers
zebra mussel - Dreissena polymorpha 384
Northern Snakehead - Channa argus 324
quagga mussel - Dreissena rostriformis 313
Silver Carp - Hypophthalmichthys molitrix 283
Bighead Carp - Hypophthalmichthys nobilis 275
Black Carp - Mylopharyngodon piceus 275
Round Goby - Neogobius melanostomus 245
Ruffe - Gymnocephalus cernua 215
lionfish - Pterois volitans/miles 144
hydrilla - Hydrilla verticillata 105
Rusty Crayfish - Faxonius rusticus 102
Red Swamp Crayfish - Procambarus clarkii 102
wandering hydrilla - Hydrilla verticillata 91
whorled hydrilla - Hydrilla verticillata 88
common water - Eichhornia crassipes 83
starry stonewort - Nitellopsis obtusa 81
giant salvinia - Salvinia molesta 73
water chestnut - Trapa bispinosa 69
water chestnut - Trapa natans 68
Cuban Treefrog - Osteopilus septentrionalis 53
New Zealand mudsnail - Potamopyrgus antipodarum 10
yellow floating - Nymphoides peltata 6
Eurasian watermilfoil - Myriophyllum spicatum 6
Golden Mussel - Limnoperna fortunei 5
parrot feather - Myriophyllum aquaticum 5
Grass Carp - Ctenopharyngodon idella 5
flowering rush - Butomus umbellatus 4
Brazilian waterweed - Egeria densa 4
marbled crayfish - Procambarus virginalis 4
green crab - Carcinus maenas 4
Australian redclaw crayfish - Cherax quadricarinatus 3
Chinese mysterysnail - Cipangopaludina chinensis 3
freshwater golden clam - Corbicula fluminea 3
Blue Catfish - Ictalurus furcatus 3
red - Melanoides tuberculata 3
variable - Myriophyllum heterophyllum 3
Northern Pike - Esox lucius 2
Carolina fanwort - Cabomba caroliniana 2
Prussian carp - Carassius gibelio 2
Flathead Catfish - Pylodictis olivaris 2
brittle waternymph - Najas minor 2
Sea Lamprey - Petromyzon marinus 2
spiny waterflea - Bythotrephes longimanus 2
Virile Crayfish - Faxonius virilis 2
Japanese mysterysnail - Cipangopaludina japonica 2
Chinese mitten crab - Eriocheir sinensis 2
curly - Potamogeton crispus 2
giant applesnail - Pomacea maculata 2
ranae - Hydrocharis morsus2
channeled applesnail - Pomacea canaliculata 2
American white waterlily - Nymphaea odorata 2
Chanchita - Cichlasoma dimerus 1
Alabama Bass - Micropterus henshalli 1
common reed - Phragmites australis 1
fishhook waterflea - Cercopagis pengoi 1
grassy arrowhead - Sagittaria graminea 1
Midas Cichlid - Amphilophus citrinellus 1
eastern happy - Astatotilapia calliptera 1
West Indian spongeplant - Limnobium laevigatum 1
waterwheel plant - Aldrovanda vesiculosa 1
Goldline Snakehead - Channa aurolineata 1
Arizona Treefrog - Dryophytes wrightorum 1
Western Mosquitofish - Gambusia affinis 1
red devil - Amphilophus labiatus 1
water milfoil - Myriophyllum sp. 1
White River crawfish - Procambarus acutus 1
Cane Toad - Rhinella marina 1
Suckermouth Catfish - Hypostomus plecostomus 1
Regal Demoiselle - Neopomacentrus cyanomos 1
northern hydrilla - Hydrilla verticillata 1
Jaguar Guapote - Parachromis managuensis 1
red discus - Symphysodon discus 1
six petal water primrose - Ludwigia hexapetala 1
a calanoid copepod - Eurytemora affinis 1
mud bithynia - Bithynia tentaculata 1
axe - Xenostrobus securis 1
Yellow Bass - Morone mississippiensis 1
anchored waterhyacinth - Eichhornia azurea 1
Freshwater Tubenose Goby - Proterorhinus semilunaris 1
Brazilian water hyacinth - Eichhornia paniculata 1
crested floating - Nymphoides cristata 1
Freshwater Drum - Aplodinotus grunniens 1
cuchia - Monopterus cuchia 1
East Asian river prawn - Macrobrachium nipponense 1
purple loosestrife - Lythrum salicaria 1
floating primrose - Ludwigia peploides 1
Eastern Mosquitofish - Gambusia holbrooki 1
unidentified rams - Helisoma sp. 1
suckermouth catfish - Hypostomus sp. 1
Chinese pond mussel - Sinanodonta woodiana 1
White Perch - Morone americana 1
Lowland Cichlid - Herichthys carpintis 1
hybrid watermilfoil - Myriophyllum sibiricum × spicatum 1
Spotted Bass - Micropterus punctulatus 1
European ear snail - Radix auricularia 1
holly - Najas marina 1
bigeye lates - Lates mariae 1
Southern White River Crayfish - Procambarus zonangulus 1
- Caulerpa prolifera 1
American Bullfrog - Lithobates catesbeianus 1
Grass Carp (diploid) - Ctenopharyngodon idella 1
Threadfin Shad - Dorosoma petenense 1
Cuban bulrush - Cyperus blepharoleptos 1
Panther Grouper - Chromileptes altivelis 1
Allegheny crayfish - Faxonius obscurus 1
Rudd - Scardinius erythrophthalmus 1
Tanganyika lates - Lates angustifrons 1
Asian Swamp Eel - Monopterus albus 1
African Jewelfish - Hemichromis letourneuxi 1
floatingheart - Nymphoides sp. 1
cutleaf watermilfoil - Myriophyllum pinnatum 1
Nile perch - Lates niloticus 1


Disclaimer:

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/21/2025].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.