The Stechlin cisco, a dwarfed fish, is found only in this lake.

Theodor Fontane's last novel, Der Stechlin, was set in its vicinity.

Stechlinsee has a maximum depth of 69.5 metres, making it the deepest lake in the State of Brandenburg.

It is home to the Leibniz Institute of Freshwater Ecology and Inland Fisheries.

[1] The Stechlin district is still one of the most important oligotrophic landscapes of Central Europe and a LIFE project was undertaken for the restoration of clear water lakes, mires and swamp forests of the Lake Stechlin.