Rusty parrot fish
( Scarus ferrugineus )
Parrot has got a beak for crashing corals. Because of strong teeth it is dangerous but not aggressive. To be biten by a parrot you should anger it. Size 40-50 cm. Lives only in Red Sea. All young fry are females. Then some of them turns to males.
When a Parrot fish or a Masked puffer bites hard coral you can hear quite loud crushing sound.