I know I sure wasn’t tempted to go lake swimming this year in central Texas. This article is a lot more informative than anything I’ve read locally following the 2 deaths in Lake LBJ.
Did you see the story about the other creatures they found in another Texas lake?
I believe they were also amoebas which, are normally the size of a pencil eraser. These things grew to the size of dinner plates. Looked a little like those cabbage-head jellyfish you see at the coast.
I blame it on fertilizer runoff.