Zooflagellates may live in lakes and steams?

Yes, that's correct. Zooflagellates are a diverse group of single-celled organisms with flagella, which are whip-like structures they use for movement. They are found in a variety of habitats, including:

* Freshwater: Lakes, streams, ponds, and even puddles are common homes for zooflagellates.

* Saltwater: They also inhabit marine environments like oceans and seas.

* Soil: Zooflagellates can be found in moist soil as well.

* Other organisms: Some zooflagellates live as parasites inside the bodies of other organisms, like animals and plants.

So, it's very likely to find zooflagellates living in lakes and streams!