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.Its 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.