Lake Hévíz among Rotatorias as well ("Epiphanes brachionus" var. "Spinosus", "Lecane inermis"), which are only present in warm waters. Jenő Ponyi has described the lake's primitive crustaceans in detail. Also a unique "Hydracarina acarus" is said to have found its habitat outside the fence surrounding the lake. The waters are reported to be beneficial to patients suffering from rheumatic diseases and locomotor disorders, among others. There is a thriving health tourism industry in the area. Lake Hévíz Lake Hévíz is located in Hévíz, Hungary, near the western end of Lake Balaton, from Keszthely. It is the largest thermal lake in the world,
Petenwell Lake northern pike, bass, panfish, and muskellunge. The area around the lake has restaurants, a community theater, a golf course and two casinos. Lake Petenwell has blue-green algae blooms in the summer, the toxicity of which is unknown. The algae, which exists naturally in most lakes, is magnified on Lake Petenwell as a result of industrial and agricultural sources upstream. Petenwell Lake Lake Petenwell is a man-made lake in central Wisconsin, in Adams, Juneau, and Wood counties next to Castle Rock Lake. It covers over and is deep. Lake Petenwell is Wisconsin's second largest lake at or approximately . It was