Closterium limneticum is a green algae characterized by elongated, crescent-shaped cells with a central constriction dividing them into two unequal semicells. These cells range from 100 to 400 micrometers in length and are enclosed by a thin cellulose cell wall. They contain multiple parietal chloroplasts with pyrenoids for starch storage. Closterium limneticum reproduces through both asexual cell division and sexual conjugation. It inhabits freshwater environments like ponds and lakes, where it plays a crucial role as a primary producer and supports aquatic ecosystems by cycling nutrients and providing food for various organisms.