NAS Alert System

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Total of 3528 alerts match your criteria. Click on each Specimen ID to get details about the collection.
Specimen IDDateSpeciesNew AreaAlert Risk Map Explanation of ARM
The Nonindigenous Aquatic Species Alert Risk Mapper (ARM), was developed to characterize the waterbodies at potential risk of invasion from a new nonindigenous species sighting. The ARM tool is a short-term risk assessment utilizing a nonindigenous species' current extents and development of credible scenarios of its potential movement within a drainage based on its mobility and drainage barriers (dams). Maps from ARM will indicate lakes, river reaches, and other waterbodies that are at potential risk of invasion from a new nonindigenous species sighting and will accompany the NAS Alert emails sent out to subscribers and managers.
Comments
1863569 4/3/2025 freshwater golden clam
Corbicula fluminea 		County: Navajo (AZ)
Drainage: Middle Little Colorado (15020008)
 
1863546 3/27/2025 shortstemmed eelgrass
Vallisneria × pseudorosulata 		State: MS
County: Prentiss (MS)
Drainage: Upper Tombigbee (03160101)
 
1863501 3/25/2025 mysterysnail
Cipangopaludina sp. 		County: Franklin (OH)
Drainage: Upper Scioto (05060001)
 
1863475 3/25/2025 Japanese mysterysnail
Cipangopaludina japonica 		County: Delaware (PA)
Drainage: Schuylkill (02040203)
 
1758464 3/25/2025 quagga mussel
Dreissena bugensis 		County: Walworth (WI)
Drainage: Upper Fox (07120006)
*Bonus* This is the first occurrence of this species in the county and HUC.
1758479 3/14/2025 Silver Carp
Hypophthalmichthys molitrix 		County: Russell (KY)
Drainage: Upper Cumberland-Lake Cumberland (05130103)
 
1753371 2/28/2025 Pond Loach
Misgurnus anguillicaudatus 		County: Greene (GA)
 
1757647 2/18/2025 prickly water lily
Euryale ferox 		Country: US
State: MN
County: Ramsey (MN)
Drainage: Twin Cities (07010206)
 
1753357 1/14/2025 axe-head mussel
Xenostrobus securis 		Country: US
State: CA
County: Los Angeles (CA)
Drainage: San Gabriel (18070106)
 
1753134 1/3/2025 nutria
Myocastor coypus 		State: MS
Drainage: Mississippi Coastal (03170009)
*Bonus* First record from barrier islands/National Seashore in Mississippi
1740356 1/2/2025 West Indian marsh grass
Hymenachne amplexicaulis 		State: SC
County: Charleston (SC)
Drainage: Edisto River (03050206)
 
1740412 12/30/2024 Indo-Pacific swimming crab
Charybdis hellerii 		Drainage: Salkehatchie (03050207)
 
1740346 12/20/2024 Rusty Crayfish
Faxonius rusticus 		County: Mahaska (IA)
Drainage: South Skunk (07080105)
 
1740332 12/20/2024 magnificent bryozoan
Pectinatella magnifica 		County: Tulare (CA)
Drainage: Upper Kaweah (18030007)
 
1740345 12/20/2024 zebra mussel
Dreissena polymorpha 		County: Marion (IA)
Drainage: Lake Red Rock (07100008)
 
1740333 12/20/2024 mysterysnail
Cipangopaludina sp. 		County: Pend Oreille (WA)
Drainage: Pend Oreille (17010216)
 
1740330 12/19/2024 Virile Crayfish
Faxonius virilis 		County: Carbon (PA)
Drainage: Lehigh (02040106)
 
1740297 11/26/2024 Red Swamp Crayfish
Procambarus clarkii 		County: Bryan (GA)
Drainage: Ogeechee Coastal (03060204)
 
1740288 11/20/2024 Blackbelt Cichlid
Vieja maculicauda 		State: PR
County: Fajardo (PR)
Drainage: Eastern Puerto Rico (21010005)
 
1740285 11/19/2024 tilapia
Oreochromis sp. 		County: Jefferson (LA)
Drainage: Eastern Louisiana Coastal (08090203)
 
1740284 11/19/2024 Greenhouse Frog
Eleutherodactylus planirostris 		County: Dorchester (SC)
Drainage: Cooper (03050201)
 
1740283 11/15/2024 Brown Hoplo
Hoplosternum littorale 		County: Lafayette (FL)
Drainage: Lower Suwannee (03110205)
 
1740281 11/8/2024 zebra mussel
Dreissena polymorpha 		County: Polk (IA)
Drainage: Middle Des Moines (07100004)
 
1740275 11/5/2024 wandering hydrilla
Hydrilla verticillata 		County: DuPage (IL)
Drainage: Des Plaines (07120004)
 
1740274 11/5/2024 waterpoppy
Hydrocleys nymphoides 		State: CA
County: Ventura (CA)
Drainage: Calleguas (18070103)
 
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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 [4/19/2025].

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.



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