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,
Leech Lake Leech Lake Leech Lake is a lake located in north central Minnesota, United States. It is southeast of Bemidji, located mainly within the Leech Lake Indian Reservation, and completely within the Chippewa National Forest. It is used as a reservoir. The lake is the third largest in Minnesota, covering with of shoreline and has a maximum depth of . Leech Lake outlets to the Leech Lake River, which flows into the Mississippi River. The sole outlet to the Leech Lake River is controlled by a dam in order to regulate water levels of the lake. Leech Lake has seven major