Lake Ohrid is a natural phenomenon, a rare example of an ancient lake with a rich biodiversity. As a result of its geographic isolation and uninterrupted biological activity, it provides a niche habitat to 1,200 species, with new species still being discovered today. As many as 200 of them, including algae, turbellarian flatworms, snails, crustaceans and 17 endemic species of fish, do not live anywhere else in the world. That’s why the lake is also branded as the Museum of Living Fossils, a Theater of Evolution and the Balkan Galapagos. The natural beauty of the lake is, however, vulnerable, particularly due to changes in water quality, and there is evidence of growth in nutrients that threaten the oligotrophic ecology of the lake.