Amphibolis griffithii is a seagrass found in waters along the southwestern coasts of Western Australia, extending to Encounter Bay in South Australia .
A common marine herb, the rhizomatous plant forms meadows which stabilise sands; the intertwining roots and leaves protects the substrate from ocean currents. The species is perennial, bears its male and female flowers on separate plants, and produces fruit on the leaves. The plant reproduces by viviparous means, the seed germinating before leaving ...