The lake is just over 140 meters long and 8 meters deep. It has neither tributaries nor emissaries, but the underground water circulation is such as to allow a rapid exchange of water anyway.
Hence its particular transparency and very low temperature variations (which generally fluctuate between 9-11 ° C) during the year (homeothermics). These characteristics allow it to be classified as an oligotrophic lake as it is poor in nutrients. The bottom is populated by green algae that form dense underwater grasslands, while the rocks are colonized by blue algae.
The scarcity of nutrients present and the low temperature of its waters greatly reduce the chances of life inside. The fish fauna present is scarce and linked to the introduction of Cyprinids and Salmonids, but the presence of the Crayfish (Austrapotamobius pallipes) is certainly interesting.
