海菖蒲属（学名：Enhalus）是水鳖科下的一个属，为海生、沉水草本植物。该属仅有海菖蒲（Enhalus acoroides）一种，分布于印度洋和西太平洋一带海岸。

Enhalus is a monotypic genus of marine flowering plants. Enhalus is large seagrass native to coastal waters of the tropical Indian and Western Pacific Oceans. The strap-shaped leaves arise directly from the rhizomes and can reach 1 m in length. Enhalus is surface pollinated with male flowers that detach from the plant to float on the surface until they reach a female flower where pollination can occur.