Microsorum pteropus 'Narrow' is a variant of the Java Fern characterized by its slender, arching leaves that grow at a less acute angle from the stem compared to the standard form. The leaves typically reach lengths of 10–20 cm, with rhizomes extending from 10–15 cm or more. This plant readily attaches to roots and stones, making it a decorative choice suitable for smaller aquariums. It thrives in low to moderate lighting and does not require CO₂ supplementation, making it ideal for both beginners and seasoned aquarists.