> [!summary]- Classification
**Kingdom**:: [Vegetalia](Vegetalia.md)
**Phylum**:: Magnoliophyta
**Subphylum**::
**Superclass**::
**Class**:: Liliopsida
**Subclass**:: Alismatidae
**Superorder**:: Alismatanae
**Order**:: Alismatales
**Suborder**::
**Superfamily**::
**Family**:: Posidoniaceae
**Subfamily**::
**Genus**:: Posidonia
**Species**:: P. oceanica
**Vernacular**:: Neptune-grass
## Photos
*Snorkeling in La Ciotat, Baie des Anges*
## Notes
One of the most important herb in Mediterranean sea because of its keystone role in the marine ecosystem. It's protected.
## References
- https://doris.ffessm.fr/Especes/Posidonia-oceanica-Posidonie-265
- [Découvrir la vie sous-marine - Méditerranée - Steven Weinberg](Découvrir%20la%20vie%20sous-marine%20-%20Méditerranée%20-%20Steven%20Weinberg.md) p122