Ok guys listen to this story, last year back in charm el sheik some friends had a safari.
During the safari the owner of the boat and the divemaster went on a deep air dive,
And never came back 2 days later they found the divemaster, but with one hand and one leg missing they took his computer and download his dive and look what they found:
They went to 100 m and then the divemaster went to 140m and then up to 100m more then 3 or 4 times going up and down in less then a minute , , I dont remember the details of the story but they say that a shark had attack then. Though in the red sea the reef shark run away from u if he saw u in the water, and u can even dive between hammer head sharks in the morning with no problem.
Anyway u cant predict what the next step of the shark is if he was in the dive site.
In my country we have weight sharks 5 or 6m ones and we dive next to them but we are always worried, anything could happen u will never know. but we never had any accident .Take care guys