Java fern on wood is an aquatic plant that is often used to add a decorative touch to aquariums. It is a popular choice for aquariums because it is low-maintenance and requires no fertilizer. Java fern is a slow-growing, hardy plant that attaches itself to driftwood, rocks, and aquarium gravel with small, root-like structures called rhizoids. It has dark green, lance-shaped leaves and grows up to 18 inches in height. The plant can tolerate a wide range of water temperatures and conditions, making it a great choice for novice aquarists.