Stentor are omnivorous heterotrophs. Typically, they feed on bacteria or other protozoans. Because of their large size, they are also capable of eating some of the smallest multicelluar organisms, such as rotifers.

How do Stentors eat?

Stentors, like most ciliates, are filter feeders; passively eating whatever happens to be swept in their direction. They normally eat bacteria and algae, though large stentors are reported to opportunistically eat rotifers or anything else that they can catch.

How does Stentor move and feed?

As a unicellular protozoa, Stentor can be up to 2 millimeters in size, making them visible to the naked eye. They live in stagnant freshwater environments and feed on bacteria. They move and eat through the use of cilia, and they maintain their water balance with the use of a contractile vacuole.