Common name: a freshwater crab
Identification: Geothelpusa dahaani is actually a species complex comprised of 2-3 species.
Native Range: Japan.
Interactive maps: Point Distribution Maps
Puerto Rico &
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 Geothelphusa dehaani are found here.
Table last updated 3/29/2018
† Populations may not be currently present.
Means of Introduction: Although it was intially speculated that their introduction was likely the result of an aquarium release, their release has been traced to a sushi bar (A. Cook, pers. comm.).
Status: No more crabs have been collected since the initial find.
Revision Date: 8/28/2006
Fuller, P., 2018, Geothelphusa dehaani: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=193, Revision Date: 8/28/2006, Access Date: 4/23/2018
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.