Rotifers are a type of worm found in the mud and slime at the bottom of rapidly moving fresh waters.

Rotifers are microscopic aquatic animals that are primarily found in freshwater environments, including both still and flowing waters. However, they are not classified as worms; instead, they belong to a separate phylum called Rotifera. They can thrive in a variety of aquatic habitats, from stagnant ponds to rapidly flowing streams, and even in some brackish waters. The statement that implies rotifers are a type of worm is misleading. Therefore, identifying the statement as false is correct because it misstates the taxonomic classification of rotifers and suggests an inaccurate environmental constraint. This understanding helps to clarify the biological and ecological roles of rotifers in various aquatic ecosystems.