An Anubias nana will typically not survive long as a floating plant. It is meant to be a planted species, as leaving it floating can expose the plant to too much light. However, some pet parents have had sporadic luck keeping their Anubias water plant hovering in their aquarium—usually in low-light settings and with extreme care. If you don’t have the time to monitor and adjust your aquatic plants regularly, the roots of this plant can secure to either substrate or decorations—so you have plenty of options for where to place it.