I found four different organisms. They were a Large Dero vagus (Pennak, 1989), a smaller Dero vagus (Pennak, 1989), Coleps (Patterson, 1992), and Nematoda (Patterson, 1992).
(Pennak, 1989) p. 301, Fig. 11 Dero vagus
The large Dero vagus was in a sort of tube and he was eating off the bottom. You could see the food moving through his body until he defecated. Aside from eating and bowel movements he did not move. He was at the very bottom and is a multi-cellular organism without chlorophyll.
(Pennak, 1989) p. 301, Fig. 11 Dero vagus
There were several of the smaller Dero vagus and they were found all along the bottom of the tank eating. They moved from place to place in a very twisted/jerkish manner and have no Chlorophyll.
(Patterson, 1992) p.163 Fig. 377 Coleps
The Coleps moved very quickly and sporadically. Most of them were found either around a small food source or out in the open parts of the Aquarium. They are multicellular organisms and do not have cholorophyll.
(Patterson, 1992) Fig. 1 p. 228 & 229. Nemitode
There were few Nemitodes. They were found around the middle the middle of the tank out in the open. They squirmed around the tank a bit like and inch worm. They are multicellular and have no chlorophyll.
Bibliography:
1. Patterson, DJ. 1992. Free-living Freshwater Protozoa: A color guide. London (UK): Manson Publishing Ltd. 163 p. Fig. 377.
2. Pennak, Robert W. 1989. Fresh-Water Invertebrates of the United States: Protozoa to Mollusca. 3rd ed. United States:John Wiley & Sons, Inc. 228, 229, & 301 p.
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