Definition
Characeae is a family of green algae within the order Charales, commonly known as stoneworts. These algae are multicellular and primarily found in freshwater environments. They exhibit a stem-like structure with whorls of branches, resembling underwater plants. Think of them as the elegant decorations of freshwater habitats. They contribute to the ecosystem by providing shelter and food for aquatic organisms. They're like miniature coral reefs in lakes and ponds.