the first one I have read already, the second one says "oop's link broken"
I still do not know what they are but they disappear in the light, I have never noticed fish eating them or them swimming as the first link said. This doesn't mean that is not what they are, I just don't know. If it is, it says they are not a threat and are actually kind of a benefit.
I am not sure if the "try acknowledging my theory" was meant to be snotty but it sounded like it. I wasn't ignoring your theory, just looking for all different opinions and thoughts. I was hoping to hear some first hand experience with such a thing. Thanks for posting the links and your theory. I will be looking further into it.