Grey oval slim body with a long thin yellow dorsal fin. A C-like tail fin. An orange surgical knife near tail.

Orangespine unicornfish

A Surgeon fish. Oval body. Crescent like tail fin. Small orange fin near the tail is the sharp surgeon knife.
Arabian Surgeon fish

( Naso elegans )

Grey oval slim body with a long thin yellow dorsal fin. A C-like tail fin. An orange surgical knife near tail. Mouth is small like butterflyfishes one. Eats plants. Size 45cm. Deep 1-100m.