NAS Alert System



The 10 most recent alerts are available at RSS

Total of 2847 alerts match your criteria. Click on each Specimen ID to get details about the collection.
Specimen IDDateSpeciesNew AreaAlert Risk Map Comments
1658208 7/29/2021 monoecious hydrilla
Hydrilla verticillata [monoecious]
County: Trumbull (OH)
Drainage: Mahoning (05030103)
1658182 7/28/2021 Rio Cauca Caecilian
Typhlonectes natans
Country: US
State: FL
County: Miami-Dade (FL)
Drainage: Florida Southeast Coast (03090206)
*Bonus* First observation of the order Gymnophonia in the United States
1658181 7/28/2021 Chinese mysterysnail
Cipangopaludina chinensis
County: Windham (CT)
Drainage: Shetucket (01100002)
1658125 7/20/2021 starry stonewort
Nitellopsis obtusa
Drainage: Leech Lake (07010102)
1658110 7/18/2021 parrot feather
Myriophyllum aquaticum
State: UT
County: Salt Lake (UT)
Drainage: Jordan (16020204)
1658111 7/18/2021 parrot feather
Myriophyllum aquaticum
County: Cache (UT)
Drainage: Little Bear-Logan (16010203)
1658043 7/8/2021 Northern Snakehead
Channa argus
County: Pike (PA)
1657994 7/6/2021 zebra mussel
Dreissena polymorpha
State: ND
*Bonus* This is just the third lake in the state where zebra mussels have been found.
1657943 6/25/2021 Red-eared Slider
Trachemys scripta
County: Jefferson (WI)
Drainage: Upper Rock (07090001)
1657919 6/24/2021 giant applesnail
Pomacea maculata
Drainage: Upper Calcasieu (08080203)
1657940 6/24/2021 Green Treefrog
Dryophytes cinereus
State: CA
County: Alameda (CA)
Drainage: San Pablo Bay (18050002)
1657916 6/23/2021 Japanese mysterysnail
Cipangopaludina japonica
County: Columbia (PA)
Drainage: Upper Susquehanna-Lackawanna (02050107)
1657918 6/23/2021 Lowland Cichlid
Herichthys carpintis
State: LA
County: Orleans (LA)
Drainage: Eastern Louisiana Coastal (08090203)
*Bonus* Previously identified as Herichthys cyanoguttatus
1657908 6/22/2021 Silver Carp
Hypophthalmichthys molitrix
State: TX
County: Grayson (TX)
Drainage: Bois D'arc-Island (11140101)
1657910 6/22/2021 Northern Snakehead
Channa argus
County: Warren (NJ)
Drainage: Middle Delaware-Mongaup-Brodhead (02040104)
1657890 6/21/2021 Round Goby
Neogobius melanostomus
County: Montgomery (NY)
1657889 6/21/2021 Round Goby
Neogobius melanostomus
County: Saratoga (NY)
1657612 6/10/2021 Grass Carp
Ctenopharyngodon idella
County: LaPorte (IN)
1657597 6/9/2021 Rusty Crayfish
Faxonius rusticus
County: York (PA)
1657571 6/4/2021 Black Carp (diploid)
Mylopharyngodon piceus
County: Harrison (IN)
1657580 6/4/2021 Black Carp
Mylopharyngodon piceus
County: Marshall (IL)
1657566 6/3/2021 quagga mussel
Dreissena rostriformis bugensis
State: CA
*Bonus* This is the first collection from the Santa Margarita River.
1657561 6/3/2021 Rusty Crayfish
Faxonius rusticus
Drainage: Lower Laramie (10180011)
1657567 6/3/2021 Bighead Carp
Hypophthalmichthys nobilis
County: Sedgwick (KS)
Drainage: Little Arkansas (11030012)
1657557 5/28/2021 red piranha
Pygocentrus nattereri
State: LA
County: East Baton Rouge (LA)
Drainage: Amite (08070202)


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. [2021]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/30/2021].

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 queries involving fish, please contact Matthew Neilson. For queries involving invertebrates, contact Amy Benson.