Alert System User Statistics



Total Users
986

StateSubscribers
California199
New York195
Florida191
Oregon185
Washington180
Pennsylvania180
Michigan171
Idaho166
Texas166
Wisconsin164
Minnesota157
Illinois155
Ohio155
Louisiana153
Nevada151
Indiana147
Montana145
Alabama144
Maryland144
Mississippi142
Colorado142
Wyoming141
Virginia139
Massachusetts139
North Carolina137
New Jersey137
Georgia137
Utah135
New Hampshire135
Maine134
Vermont132
Connecticut131
Alaska130
Arizona130
Delaware129
Missouri127
Tennessee127
Iowa127
South Carolina127
Kansas126
West virginia126
Arkansas125
Oklahoma124
Rhode Island123
New Mexico121
Kentucky119
North Dakota117
South Dakota116
Hawaii116
Nebraska114
District of Columbia112
Puerto Rico93
GroupSubscribers
Fishes342
Marine Fishes289
Mollusks-Bivalves282
Mollusks-Gastropods236
Crustaceans-Crayfish236
Amphibians-Frogs201
Crustaceans-Crabs195
Mammals193
Reptiles-Turtles191
Reptiles-Snakes190
Plants189
Amphibians-Salamanders184
Crustaceans-Shrimp180
Mollusks-Cephalopods168
Reptiles-Crocodilians159
Crustaceans-Copepods157
Crustaceans-Amphipods154
Crustaceans-Isopods150
Crustaceans-Cladocerans150
Reptiles-Lizards147
Crustaceans-Mysids143
Crustaceans-Barnacles119
Annelids-Oligochaetes117
Coelenterates-Hydrozoans117
Entoprocts108
Coelenterates-Scyphozoan88
Bryozoans72
Mollusks-Nudibranchs67
Rotifers63
Coelenterates-Anthozoan58
Crustaceans-Lobsters57
Tunicates56
Sponges56
Annelids-Hirundinea53
Crustaceans-Ostracods52
Annelids-Polychaetes50
Ectoprocts47
Algae47
Polyplacophors43
Cumaceans43
Nebaliaceans43
Platyhelminthes42
Amphibians-Caecilians40
Nematodes10
Birds6
SpeciesNameSubscribers
zebra mussel - Dreissena polymorpha 380
Northern Snakehead - Channa argus 321
quagga mussel - Dreissena bugensis 309
Silver Carp - Hypophthalmichthys molitrix 280
Bighead Carp - Hypophthalmichthys nobilis 272
Black Carp - Mylopharyngodon piceus 272
Round Goby - Neogobius melanostomus 243
Ruffe - Gymnocephalus cernua 214
lionfish - Pterois volitans/miles 143
hydrilla - Hydrilla verticillata 100
Rusty Crayfish - Faxonius rusticus 99
Red Swamp Crayfish - Procambarus clarkii 99
wandering hydrilla - Hydrilla verticillata 87
whorled hydrilla - Hydrilla verticillata 84
common water - Eichhornia crassipes 80
starry stonewort - Nitellopsis obtusa 77
giant salvinia - Salvinia molesta 68
water chestnut - Trapa bispinosa 67
water chestnut - Trapa natans 65
Cuban Treefrog - Osteopilus septentrionalis 51
New Zealand mudsnail - Potamopyrgus antipodarum 9
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
basket clam - Corbicula fluminea 3
Australian redclaw crayfish - Cherax quadricarinatus 3
Chinese mysterysnail - Cipangopaludina chinensis 3
Blue Catfish - Ictalurus furcatus 3
red - Melanoides tuberculata 3
variable - Myriophyllum heterophyllum 3
Carolina fanwort - Cabomba caroliniana 2
Prussian carp - Carassius gibelio 2
Northern Pike - Esox lucius 2
Flathead Catfish - Pylodictis olivaris 2
brittle waternymph - Najas minor 2
Sea Lamprey - Petromyzon marinus 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
spiny waterflea - Bythotrephes longimanus 2
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
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
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
Allegheny crayfish - Faxonius obscurus 1
Threadfin Shad - Dorosoma petenense 1
Cuban bulrush - Cyperus blepharoleptos 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
Panther Grouper - Chromileptes altivelis 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 [3/22/2025].

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.