The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Pomacea paludosa
Pomacea paludosa
(Florida applesnail)
Native Transplant
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Pomacea paludosa

Common name: Florida applesnail

Taxonomy: available through www.itis.govITIS logo

Identification: This species is the largest freshwater gastropod in North America (Burch 1982).  It is globose in shape, body whorls are wide, spire is depressed, and the aperature is narrowly oval (Burch 1982).  They are brown in color and have a striped pattern.

Size: 60 mm in length and width (Burch 1982)

Native Range: Central and southern Florida (Thompson 1984); Cuba; Hispanola (Dundee 1974).

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Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Pomacea paludosa are found here.

StateYear of earliest observationYear of last observationTotal HUCs with observations†HUCs with observations†
Alabama197019701Upper Conecuh
Florida1974201714Apalachee Bay-St. Marks; Big Cypress Swamp; Caloosahatchee; Everglades; Floridian; Kissimmee; Lake Okeechobee; Lower Choctawhatchee; Oklawaha; Peace; South Atlantic-Gulf Region; Tampa Bay; Upper St. Johns; Waccasassa
Georgia197419741Ogeechee Coastal
Hawaii199020013Hawaii Region; Maui; Oahu
Oklahoma197419741Lower North Canadian
South Carolina199820081Broad-St. Helena

Table last updated 5/25/2018

† Populations may not be currently present.

Ecology: Tropical species. Amphibious, but can survive dry seasons (Burch1982).  Applesnails have both gills and lungs.

Means of Introduction: Unknown

Impact of Introduction: Unknown

References: (click for full references)

Burch, J. B. 1982. North American freshwater snails.Walkerana 1(4):217-365.

Dundee, D. S. 1974. Catalog of introduced molluscs of eastern North America (north of Mexico). Sterkiana 55:1-37.

Thompson, F.G. 1984. The freshwater snails of Florida: a manual for identification. University of Florida Press, Gainesville, Florida, 94 pp.

Author: Benson, A.J.

Revision Date: 4/24/2006

Citation Information:
Benson, A.J., 2018, Pomacea paludosa: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=985, Revision Date: 4/24/2006, Access Date: 7/16/2018

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.

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URL: https://nas.er.usgs.gov
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Page Last Modified: Tuesday, July 10, 2018


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. [2018]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/16/2018].

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