Alert System User Statistics



Total Users
994

StateSubscribers
California200
New York196
Florida196
Oregon186
Washington182
Pennsylvania181
Michigan172
Texas169
Idaho167
Wisconsin165
Minnesota159
Illinois157
Ohio157
Louisiana156
Nevada152
Indiana149
Alabama147
Montana146
Mississippi145
Maryland145
Colorado143
North Carolina142
Virginia142
Wyoming142
Georgia142
Massachusetts140
New Jersey138
Utah136
New Hampshire136
Maine135
Vermont133
Connecticut132
South Carolina132
Alaska131
Arizona131
Tennessee130
Delaware130
Missouri129
Kansas128
Arkansas128
Iowa128
West virginia128
Oklahoma126
Rhode Island124
New Mexico122
Kentucky122
North Dakota118
South Dakota117
Hawaii117
Nebraska115
District of Columbia113
Puerto Rico95
GroupSubscribers
Fishes345
Marine Fishes292
Mollusks-Bivalves285
Mollusks-Gastropods239
Crustaceans-Crayfish238
Amphibians-Frogs203
Crustaceans-Crabs197
Plants195
Mammals195
Reptiles-Turtles193
Reptiles-Snakes192
Amphibians-Salamanders186
Crustaceans-Shrimp182
Mollusks-Cephalopods171
Reptiles-Crocodilians162
Crustaceans-Copepods159
Crustaceans-Amphipods156
Crustaceans-Isopods152
Crustaceans-Cladocerans152
Reptiles-Lizards149
Crustaceans-Mysids145
Crustaceans-Barnacles121
Coelenterates-Hydrozoans119
Annelids-Oligochaetes117
Entoprocts108
Coelenterates-Scyphozoan89
Bryozoans74
Mollusks-Nudibranchs67
Rotifers63
Coelenterates-Anthozoan60
Crustaceans-Lobsters57
Tunicates56
Sponges56
Annelids-Hirundinea53
Crustaceans-Ostracods52
Algae50
Annelids-Polychaetes50
Ectoprocts47
Nebaliaceans43
Polyplacophors43
Cumaceans43
Platyhelminthes43
Amphibians-Caecilians41
Nematodes10
Birds6
SpeciesNameSubscribers
zebra mussel - Dreissena polymorpha 383
Northern Snakehead - Channa argus 323
quagga mussel - Dreissena rostriformis 312
Silver Carp - Hypophthalmichthys molitrix 282
Bighead Carp - Hypophthalmichthys nobilis 274
Black Carp - Mylopharyngodon piceus 274
Round Goby - Neogobius melanostomus 244
Ruffe - Gymnocephalus cernua 214
lionfish - Pterois volitans/miles 143
hydrilla - Hydrilla verticillata 104
Rusty Crayfish - Faxonius rusticus 101
Red Swamp Crayfish - Procambarus clarkii 101
wandering hydrilla - Hydrilla verticillata 90
whorled hydrilla - Hydrilla verticillata 87
common water - Eichhornia crassipes 82
starry stonewort - Nitellopsis obtusa 80
giant salvinia - Salvinia molesta 72
water chestnut - Trapa bispinosa 68
water chestnut - Trapa natans 67
Cuban Treefrog - Osteopilus septentrionalis 52
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 [5/2/2025].

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.