Platyhelminthes 5 species of Ectoprocta 10 species of Nematoda 13 species of Oligochaeta 16 species of Hirudinea 52 species of Ostracoda 19 species of Copepoda...

published in 1985 counted 166 different species, including 82% protozoa, 4% oligochaeta and nematodes, 4% arthropods (copepods, diptera and mites), 2% rotifers...