Caddisfly
larvae
dragonfly nymph
diving
beetle
diving beetle larvae
mayfly nymph
water
boatman
water cricket
water
scorpion
whirlygig
beetle
Euglena
Rotifers
Waterbear (tardigrade)
Nematode
Planarian
cyclops
water
shrimp
water flea (Daphnia)
Volvox (green)
Haematococcus
(red colored)
dinoflagellate (red, green, some multicolored)
Desmids (green)
Spirogyra
(green)
Anything green and stringy can be classified as an algae!!!