Salvinia Cucullata

Native to Southeast Asia and parts of South Asia, Salvinia cucullata is one of the more visually distinctive floating ferns you'll come across. Its leaves are small and cupped, folding upward into a hood-like shape that gives them a almost sculptural look on the water surface. That cupping isn't just decorative either as it traps tiny air pockets that help the plant stay buoyant and repel water, a feature you can actually see when you look closely at a healthy colony.

Growth is moderate compared to the more aggressive Salvinia minima or S. natans, so it won't completely choke your surface in a week if you miss a trim. It spreads by fragmentation, new plantlets branching off the main colony naturally.

For placement, it works well in any tank where you want dappled surface coverage without committing to a high-maintenance floater. It does appreciate some gentle surface movement but not strong turbulence, which can damage the delicate leaves.

If you search tank builds online, you'll find it showing up in everything from betta biotopes to shrimp tanks, usually doing exactly what it promises.