This fish is called Hawkfish. You have to approach them very slow an carefully as they are very shy. Rapid movements is chasing them into the reef and they are gone.
The picture was taken at the infamous Blue Hole in Dahab, South-Sinai, Egypt. Taking this picture I was at the beautiful saddle of the Blue Hole in only about 7 metres.
Tags: animals, diving, underwater, reef, ocean, coral, fish, red sea, hawkfish, blue hole