The escolar, Lepidocybium flavobrunneum, a species of fish in the family Gempylidae, is found in deep (200–885 m) tropical and temperate waters around the world. It is also known as snake mackerel, walu walu (Hawaiian, also seen written waloo), and is sometimes fraudulently sold as "butterfish" or "white tuna", a matter aggravated by potential health problems related to consumption of escolar.