Characium rostratum is a spindle-shaped green alga belonging to the Desmidiaceae family. It has cells with a structured cellulose cell wall and contains ribbon-like chloroplasts responsible for photosynthesis. Reproduction occurs through binary fission and sexual conjugation. Commonly found in freshwater habitats like ponds and lakes, Characium rostratum plays a crucial role as a primary producer, contributing to nutrient cycling and supporting aquatic ecosystems.