Halophila Thouars
Marine submerged plants with creeping stems Halophila
Leaves glabrous, with 10–14 pairs of lateral veins. Plants dioecious. Spathe 1-flowered. On sand and mud in protected marine habitats Halophila ovalis
Leaves with fine hairs on the lower surface, with 6–9 pairs of lateral veins. Plants monoecious. Spathe with 1 male and 1 female flower. On sand in protected marine habitats Halophila decipiens