You may be swimming with jellyfish in Michigan

• These freshwater jellies are "common, though rarely seen" and aren't harmful to humans, per a state Department of Natural Resources press release.

Flashback: Freshwater jellyfish aren't native to North America but have been here for over 100 years and don't cause problems, the DNR says.

• The first one observed in our state was in 1933, in southeast Michigan's Huron River.

Reality check: While these tiny creatures look and move like traditional jellyfish, they have a membrane that the marine ones lack. So they're "related," but not "true jellyfish," per the DNR.

• The biggest they get is about the size of a quarter.