In upcoming National Geographic documentary, marine biologists explore the idea that sharks with aggressive personalities may be the reason for some attacks.
The incident happened when Tyler and his friend were about 65 miles south-southwest of Tampa Bay. Fisherman pets 16-ft shark that bit his boat s motor 
Close encounters with sharks are cases of curiosity or predation. In both cases, the human is vulnerable and can perish in a matter of seconds. In other words, not many live the tell the tale of a deadly shark attack.
A fisherman in the Gulf of Mexico is one of the lucky ones to have survived a shark attack. Although he didn t suffer any direct attack to his body, his close encounter experience with a 16-foot great white shark is something right out of Steven Spielberg s Jaws.
Four Floridians went fishing in Gulf of Mexico 65 miles offshore on Friday
They suddenly noticed a 16ft great white shark approaching their boat
Shark circled the boat for some three hours as it ate chum thrown in the water
At one point, shark could be seen getting close enough for captain to pet it
Shark also took a bite of the motor, though no serious damage was caused