Rotifera (Wheel Animals)

Family: Rotifera
This family consists of microscopic animals, mainly found in freshwater. They are rarely found in marine or parasites.

Monogononta
Monogononta rotifers are found mostly in freshwater, but they can also be found in soil and marine environments. The males are usually smaller than the females since they are produced during certain times of a year. This family of Rotifers include both free swimming and sessile forms. There are about 1800 species discovered by scientist and biologists.

Bdelloidea
Bdelloidea rotifers are found in freshwater habitats around the world. They are able to survive in dry, harsh environments. It contains around 350 different species.

Siesonidae
These rotifers are found on the gills of Nebalia, a marine crustacean. Both females and males are present and are equal in size. There ere only three known species.