I typed in microscopic jellyfish parasite in search engine , lots of articles on this and most of them recent news articles . Now they think sea lice attacks to bathers at beaches were actually microscopic parasitic jellyfish. I found one article where they found some in human stool samples . Here is the article. http://www.haaretz.com/israel-news/science/1.687159 I sent this article back to my mom with above comments .I should get some input back later , I will update when info arrives.