IT'S A JUVENILE EMPEROR ANGELFISH!
This type of fish is very much admired by people because of its really cool looks and bright colors, especially it's juvenile stage seen here. The adult version of this fish has many blue and yellow stripes on its body and wears a black mask around the eyes. The tail of this fish can be of any color either orange or yellow. The dorsal fin is notched with a pale edge. The nose is pale blue.