What does a cillanoid do?

A cillanoid is a type of aquatic organism that belongs to the plankton community, specifically within the group of protozoa. These small, often microscopic creatures play a crucial role in aquatic ecosystems by serving as both producers and consumers in the food web. They contribute to nutrient cycling and are essential for the diets of larger marine and freshwater species. Their presence can indicate the health of an aquatic environment.