1981 was a key year in the life of Manu San Félix, a 59-year-old marine biologist and National Geographic explorer. This was when he had the opportunity to make his first dive in the Mediterranean Sea. During the underwater experience, he discovered Posidonia (Posidonia oceanica) — commonly known as Neptune grass — and was so amazed by this unique plant that he decided to move to the Spanish island of Formentera, so that he could dedicate his life to protecting it.