The blue panchax or whitespot (Aplocheilus panchax) is a common freshwater fish found in a large variety of habitats due to its high adaptability. This species is native to southern Asia from Pakistan, India , Malaysia to Indonesia. It has been discovered in two hot springs in Singapore. The species also commonly spotted in Johor Bahru rivers and estuaries. Identified by a white-coloured spot on its head, the species can reach up to 9 cm (3.5 in) in length; it tends to keep to the surface of the water, and controls the mosquito population by feeding on their larvae.