Australian Hi Fin Butterfly (Coradion altivelis).

The Australian Hi Fin Butterfly, scientifically known as Coradion altivelis, is a marine ray-finned fish belonging to the butterflyfish family (Chaetodontidae). It is also commonly called the Highfin Butterflyfish or Highfin Coralfish. This species has a distinctive appearance with a silver-white base color, two dark brown bars behind the pectoral fins, a yellow-orange bar at the rear, and a dark brown bar through the eyes.