Lake Constance trout (Salmo trutta) was almost extinct in the 1980s due to pollution, but thanks to protective measures has made a significant return.
The lake itself is an important drinking water source for southwestern Germany, called Bodensee-Wasserversorgung ("Lake Constance Water Supply").
Car ferries link Romanshorn, Switzerland to Friedrichshafen, and Konstanz to Meersburg
