Sorry not to reply sooner. All this information is a bit overwhelming. I'm trying to find the time to do more reading.
My goal is to have large BG for eating; maybe to harvest 100 to 200 per year, possibly more if a small pond like mine can handle it.
The BG I have I transferred from my fathers pond. Sorry, I don't know what kind they are. I will try to catch or net some and take a picture in a few days. We are very busy right now with graduations.
Again, please excuse my newbieness. What are the invertebrates you are referring to and what can be done to increase their numbers. How large can BG get? How old will they live to be?