No they do not. They attack if provoked or if they think ur a seal.
No, sharks do not usually attack humans. Most shark species are not interested in humans as prey, and attacks on humans are extremely rare. When attacks occur, they are often a case of mistaken identity or due to the shark feeling threatened.
Sharks can see above the water line.
food
No they do not eat humans, they have been known to attack humans though. Shark attacks are VERY RARE however the tiger shark is responsible for a large percentage of the fatal attacks that do occur on humans, and is regarded as one of the most dangerous species of sharks.
Tiger sharks have adapted to be able to see whenever it is very dark. They also have a great sense of smell.
KIller Whales do not attack sharks and they do not attack anything that they see. Killer Whales only eat small sharks and fish because No creatures are mindless killers there is always a reason
sharks also eat seals and fish . and sharks when they see us above the water they mistakes us for seals
sharks go after everything they see to taste it, even if they bit a human already, they want to try it.
yes they are friendly but killer whales you can not swim with because they might think you are a seal and eat you but most other cases whales do not attack you unless they are a male or a female with a baby.
Sharks may not have the clearest eyesight, but they can detect 7 times more light than humans.
Both Dolphins and Sharks are predatory animals. They often hunt and breed in areas accessible to one another. The acts of violence toward each species can simply be due to the fact that each may be competing for hunting territory, to protection of offspring. Sharks do attack dolphins, even the related Orca(killer whale) as prey, so dolphins will attack sharks for purpose of protection. There have been recorded incidents of dolphins "protecting" human swimmers from shark attacks( by attacking sharks or swimming around humans to drive sharks away) but it is probably because dolphins don't see humans as threats, and have an instinctive emnity toward sharks.
by useing stealth,you will never see it coming,untill it's too late.