Inhabits the bottom of warm, artesian, spring-fed pools and their outlet streams. Tolerates salinity to 10 p.p.t. and temperatures between 16? and 44?C, but usually remains in water between 30? and 38?C. Fish active at night. Stomach contents consist of hydrobiid snails, conchostracans, hard parts of unidentified insects or caddisfly larval cases (Ref. 27663, 44894), microcrustaceans, fishes (hardyheads) and some plant material. The smallest member of the family; females become sexually mature at length of only 5.2 centimeters (Ref. 44894).