Tucan Fish Chalceus erythrurus

This colourful large-scaled fish is said to be the Tucan Fish or Tucanfish, native to floodplain rivers and lakes in parts of Amazonian Peru and Brazil. It grows to 20cm long. The Tucan Fish has a red tail fin but usually has yellow pectoral, pelvic and sometimes anal fins. It is similar to its relative, the Pink-tailed Chalceus, C. macrolepidotus, prevalent through much of northern South America and growing to 25cm long, but the latter has a pink tail, less body colour (especially yellow - more silver) and often has clear underside fins but can have red. So I'm not sure which of the two this one is.