Scuba Diving with Sharks
"The death of an Australian tourist bitten during an organized shark-safari has reignited arguments about the safety of such pursuits." (Swimming with sharks: is it ever safe?).
2. "All sharks have common characteristics and range in size from 1 foot to over 25 feet long. They have an extremely large mouth, with multiple rows of sharp teeth and extremely powerful jaw muscles. When a shark bites, it hangs on with a characteristic shaking of the head, side to side, crushing bone and ripping soft tissue. A single bite may be immediately fatal." (Sharks).
"Sharks are amazing and powerful animals. Although sharks are carnivorous, they do not preferentially prey on scuba divers, or even humans in general. Sharks do attack humans, but such attacks are extremely rare." (Is Scuba Diving With Sharks Dangerous?).
2. Since 1990, shark attacks haven't been bad.
"Since 1990 only 26% of attacks have resulted in serious injury and only 15% were fatal." (Shark Board).