It's not dangerous to scuba dive with sharks, as attacks on divers are extremely rare. This is because sharks don't consider divers as prey. Sharks are usually wary of humans and any attacks are mostly out of mistaken identity or due to provocation.What is a certified scuba diver?
A certified diver is someone who’s taken a diving course and learned how to set up and use the equipment, how to cope with different situations underwater, what the hand signals are and (most importantly) what not to do.What indicates scuba diver?
A diver down flag , or scuba flag, is a flag used on the water to indicate that there is a diver below. Two styles of flag are in use. Internationally, the code flag alfa/alpha, which is white and blue, is used to signal that the vessel has a diver down and other vessels should keep well clear at slow speed.