Craspedacusta sowerbyi
•Hydromedusa is transparent and 5-25 mm in diameter and produce nematocysts
•Native to Yangtze River valley in China
•Found in Quebec back in 1955, and 1980 in Ontario (Peard 2002)
•Wide range of habitats but most common in slowing-moving or stagnant waterbodies
•Reproduce in late summer (at least 25oC)
•Most reproduction is asexual
•Imported with ornamental aquatic plants
•Established in most US states (First record in 1916 in a Kentucky creek)
•Can consume fish eggs; preyed on by crayfish
•Impacts unknown
This is a freshwater jellyfish native to China.  I found that it has been collected in Canada in Quebec.  It’s found in a wide range of habitats but most common in slow-moving or stagnant waterbodies.  It reproduces asexually when the water is warmest at the end of the summer.  Most likely it was imported with ornamental aquatic plants.  It was first observed in the US in Benson Creek near Frankfort Kentucky in 1916.  The first collection near the Great Lakes was in the Huron River near Ann Arbor in 1933.  They will consume fish eggs and in turn are preyed upon by crayfish.  Still being found in new lakes similarly like the zebra mussel has been.