I have on my patio a five gallon or so glass terrarium (I guess that is what it was intended for) there has never been much in it, but from time to time I throw in some lotus seeds and watch them rise and fall. Lately, there have been numerous small critters that I am guessing are water bears but it is hard to view them through the glass and I have not yet figured out how to get some out to look at closer. I tried to grab some with a plastic tube but was unsuccessful. Whatever they are, they glide thru the water like spaceships, and seem rather busy, as it were. Question is, (and I don't have a good pic just yet) what might they be and would they be of any interest to anyone? They might make good fishfood or something like that if cultured. About half or less the size of a grain of rice, and perhaps twice as long as wide. I will try to get some pics in a few days. They seem to eat anything green. Any ideas?