CC,

What that is ... is unknown by me. Reminds me a lot of what we have here plaguing our ponds here (which I have been told is southern naiad). If you can get some out and take a clear picture against a white background, I would bet someone here will be able to identify. How long is that LMB? Please post pics of the BG as well.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers