Specimen Information

Craspedacusta sowerbyi
Craspedacusta sowerbyi
(freshwater jellyfish)

Specimen ID1652433
Common Namefreshwater jellyfish
LocalityGreen Pond, Sherman, Connecticut, 06784
Mapping AccuracyAccurate
HUC8 NameHousatonic
HUC8 Number01100005
HUC10 NameCandlewood Lake-Housatonic River
HUC10 Number0110000506
HUC12 NameCandlewood Lake
HUC12 Number011000050601
Collection Day8
Collection Month9
Collection Year2020
Year AccuracyActual
Potential Pathwayhitch hiker with stocked fish | hitch hiker on aquatic plants
CommentsSwimming around Green Pond's circumference every summer for the past 20 years, I have observed (except for the past 3 years) and twice collected specimens. On Sept. 8, 2020 I counted 250. I have not always observed them in the same place, but it seems most often over the deepest parts of the pond, whichg I estimate to be 20-30 feet deep. That Green Pond is 200 feet above the surrounding man-made (1920s) lake and is spring fed, it is not obvious how the jelly fish arrived at the pond from the Yangtze River. western parts of pond about 1-2 feet below surface. Temperature 78-80 degrees F.
Record TypeNAS sighting report
Number Collected250


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Citation information: U.S. Geological Survey. [2022]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [9/30/2022].

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