Posidonia

The crystal-clear waters of Ibiza and Formentera are legendary, drawing millions of tourists to these Spanish Mediterranean islands every year. What most visitors don't realize, though, is that the sparkling turquoise water, rich marine life, and spectacular beaches all owe their existence to an underappreciated organism: Posidonia, or seagrass. A unique flowering plant that lives entirely underwater, Posidonia is a critical component of the Mediterranean's marine ecosystems. Without it, the islands wouldn't be the same!