Ruppia tuberosa

Ruppia tuberosa is a submerged herb in the genus "Ruppia" found in shallow hypersaline waters in Australia.
Distribution and habitat.
This is a common submerged herb in Australian coasts, including NSW, SA, Vic, and WA (type locality).
Description.
This aquatic herb is one of the early diverged species in the genus.
Ecology.
The habitat is up to four times saltier than seawater.