Inside the basin of El Golfo, a half-submerged volcano eroded over centuries by the forces of the ocean. Rain and sea water has collected slowly and become trapped and divided by a mere 200 yards from the ocean. The intense green colour of the Lago Verde lagoon is due to the concentration of Ruppia-Maritima algae present in the water that can be found nowhere else on earth. It was once considered impossible for life to exist in these conditions, yet they manage to thrive here where the water is denser than the dead sea. Scientists now predict that the first discovered forms of extra terrestrial life will likely form a resemblance to these unique organisms.