SKMO- i hope to move up the marine food chain myself. Sorry SKMO but they were not bryozoans if u ever see them you will know. Check this site
http://www.jellyfish.iup.edu/US.html
and click distribution then click Missouri. They were dime size and almost clear. When I saw them there was a group of maybe 50. The site i listed does say they have been sited in T. R. in 2005 and 2006 which makes me feel better that they haven't wiped out by pollution.
One story while i'm here. A July night in 1975 Mulich and McCarty had just started fishing at dark onthe south point of campbell cove. They were a ways out from shore in about 30 feet of water when another boat starts idling out of the cove. The boat goes by only about 60 ft. away which doesn't thrill Frank at all. It gets even better a few seconds later when something hits the boat and a hellbender jumps in the boat and snags one of his rods. Frank does manage to catch the rod before it goes in the lake which probably saved the guys life. The guy stops and Frank is on the trolling telling him what he thinks of him, gender and birth right, and trying to get in his boat and kick his ***. Luckly McCarty holds him back and the guy takes off. I still laugh because Mulich is such a banty rooster (like when Donald Duck would get mad).