Bythotrephes longimanus
Bythotrephes longimanus
(spiny waterflea)

88 results for Bythotrephes longimanus (spiny waterflea)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
270089 WI Green Bay2010 04190000 Lake Michiganestablished
4263 WI Lake Michigan1986 04190000 Lake Michiganestablished
4053 WI Lake Michigan1988 04190000 Lake Michiganestablished
4264 WI Lake Superior1989 04180000 Lake Superiorestablished
168297 WIAshlandLake Superior, North Channel on east side of Basswood Island2006 04180000 Lake Superiorestablished
1709494 WIBayfieldBayfield2017 04010301 Beartrap-Nemadji 
1709495 WIBayfieldBayfield2017 04010301 Beartrap-Nemadji 
1709509 WIBayfieldBayfield2018 04010301 Beartrap-Nemadji 
1709507 WIBayfieldChequamegon Bay2018 04180000 Lake Superior 
1709508 WIBayfieldChequamegon Bay2018 04180000 Lake Superior 
270099 WIBayfieldLake Superior1987 04180000 Lake Superiorestablished
1709496 WIBayfieldPort Wing2017 04010301 Beartrap-Nemadji 
1709493 WIBayfieldSiskiwit Bay (Squaw pt.)2017 04010301 Beartrap-Nemadji 
270090 WIDaneLake Kegonsa2009 07090002 Middle Rockestablished
1424532 WIDaneLake Kegonsa2009 07090002 Middle Rockestablished
1424538 WIDaneLake Mendota2009 07090002 Middle Rockestablished
263387 WIDaneLake Mendota, in Madison2009 07090002 Middle Rockestablished
1322650 WIDaneLake Mendota, in Madison2016 07090002 Middle Rockestablished
1424738 WIDaneLake Monona2009 07090002 Middle Rockestablished
263389 WIDaneLake Monona, in Madison2009 07090002 Middle Rockestablished
1424810 WIDaneLake Waubesa2009 07090002 Middle Rockestablished
263390 WIDaneLake Waubesa, in Madison2009 07090002 Middle Rockestablished
270092 WIDoorLake Michigan1986 04190000 Lake Michiganestablished
276913 WIDoorLake Michigan1987 04190000 Lake Michiganunknown
270104 WIDoorLake Michigan at Rowleys Bay2010 04030102 Door-Kewauneeestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are 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 data.


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. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/25/2024].

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