Microsorum pteropus, commonly known as Java fern, is a popular aquatic plant native to Southeast Asia. It thrives in freshwater environments, often found attached to rocks and driftwood in rivers and streams. This hardy plant is known for its lush, green fronds that can grow up to 13 inches long, making it an attractive addition to aquariums. Java fern is easy to care for, requiring low to moderate light and minimal fertilization. It reproduces through spores and can also propagate by producing new plants on its leaves. This makes it a favorite among aquarium enthusiasts and a beneficial plant for maintaining water quality.