NAS Alert System

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Total of 3552 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
1877910 6/18/2025 Northern Snakehead
Channa argus 		County: Tunica (MS)
Drainage: Lower Mississippi-Helena (08020100)
 
1877873 6/17/2025 water chestnut
Trapa natans 		County: Lackawanna (PA)
Drainage: Upper Susquehanna-Tunkhannock (02050106)
 
1877791 6/9/2025 Chinese mitten crab
Eriocheir sinensis 		State: OR
County: Clatsop (OR)
Drainage: Lower Columbia (17080006)
 
1877789 6/9/2025 Sailfin Molly
Poecilia latipinna 		County: Los Angeles (CA)
Drainage: San Gabriel (18070106)
 
1877787 6/9/2025 Red Swamp Crayfish
Procambarus clarkii 		County: Boone (MO)
Drainage: Lower Missouri-Moreau (10300102)
 
1877421 6/3/2025 wandering hydrilla
Hydrilla verticillata 		County: Pike (PA)
Drainage: Lackawaxen (02040103)
 
1877185 5/27/2025 Cuban Treefrog
Osteopilus septentrionalis 		County: Webster (LA)
Drainage: Loggy Bayou (11140203)
 
1877182 5/22/2025 giant applesnail
Pomacea maculata 		County: Comal (TX)
Drainage: Middle Guadalupe (12100202)
 
1877134 5/16/2025 Silver Carp
Hypophthalmichthys molitrix 		County: Kankakee (IL)
Drainage: Kankakee (07120001)
 
1876617 5/12/2025 Oscar
Astronotus ocellatus 		County: Chatham (GA)
Drainage: Ogeechee Coastal (03060204)
 
1873947 5/8/2025 tropical seagrass
Halophila stipulacea 		State: FL
County: Miami-Dade (FL)
Drainage: Florida Southeast Coast (03090206)
 
1873889 5/2/2025 White River crawfish
Procambarus acutus 		County: Bucks (PA)
Drainage: Schuylkill (02040203)
 
1873873 5/2/2025 white pulse coral
Xenia umbellata 		Country: US
State: PR
County: Salinas (PR)
Drainage: Southern Puerto Rico (21010004)
 
1873892 5/2/2025 Rusty Crayfish
Faxonius rusticus 		County: Larimer (CO)
Drainage: Big Thompson (10190006)
 
1873872 5/2/2025 giant applesnail
Pomacea maculata 		County: Iberia (LA)
Drainage: Bayou Teche (08080102)
 
1873882 5/2/2025
Latissimia ningalooensis 		Country: US
State: PR
County: Ponce (PR)
Drainage: Southern Puerto Rico (21010004)
 
1872950 4/25/2025 Blue Catfish
Ictalurus furcatus 		County: Bucks (PA)
Drainage: Middle Delaware-Musconetcong (02040105)
 
1872889 4/22/2025 zebra mussel
Dreissena polymorpha 		County: Tom Green (TX)
Drainage: South Concho (12090102)
 
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)
 
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.
1863475 3/25/2025 Japanese mysterysnail
Cipangopaludina japonica 		County: Delaware (PA)
Drainage: Schuylkill (02040203)
 
1863501 3/25/2025 mysterysnail
Cipangopaludina sp. 		County: Franklin (OH)
Drainage: Upper Scioto (05060001)
 
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)
 
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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 [6/21/2025].

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.



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