Caddisfly
larvae
dragonfly nymph
great diving beetle larvae
diving
beetle
mayfly nymph
water
boatman
water cricket
water
scorpion
whirlygig
beetle
Non Insect Arthropods
cyclops
water
shrimp
water flea (Daphnia)
water
mite
Protozoans (Very small, only viewed under the microscope)
Ameba
Euglena
(green)
Rotifer
Coleps
Urotricha
Water Bear
paramecium
Worms
Oligochaete
Nematode
Algae
Volvox (green)
Haematococcus
(red colored)
dinoflagellate
Desmids (green)
Spirogyra
(green)
Anything green and stringy can be classified as an algae!!!