Azolla fern is a small, free-floating aquatic plant that forms dense mats on the water’s surface. Each plant features tiny, overlapping leaves and thread-like roots that dangle beneath the water. While typically green, Azolla can turn a reddish-brown color under certain conditions, such as high sunlight or cooler temperatures. This plant spreads rapidly, with the ability to double its concentration in just seven days, making it highly invasive. If left unmanaged, Azolla can block sunlight, reduce oxygen levels, and disrupt the balance of aquatic ecosystems. Proper management is essential to prevent excessive growth and maintain healthy water conditions.