killer whales are friendly to humans because humans are not included in the killer whale diet. Killer whales are animals with unique feeding habits. They generally feed on aquatic animals, and they will have predation inheritance. The older generation of killer whales will teach the younger killer whales the methods and goals of predation, and the killer whales of different ethnic groups will not even prey on the same food.

killer whales are friendly to humans, mainly because there is too little intersection between humans and killer whales, and they are rarely encountered. Therefore, for killer whales, they don't know what human beings taste like, and they haven't tried it. Or preying on human beings is an uneconomical business. After all, killer whales are too big and live in groups, so it's not enough to eat one person.

Unlike many animals, killer whales have no explicit territorial awareness. If they are territory-conscious animals, when they feel that their territory is invaded, no matter who they are, they will launch an attack posture. And killer whales don't take a certain place as their home, and they don't have the desire to protect their home, so they don't have much hostility towards human beings.

In addition to the above reasons, killer whales have higher IQ, which is also the reason why they are friendly to human beings. Some people have tried to throw cattle and sheep into the water, and killer whales can eat them, but they can't eat people, which shows that they can clearly distinguish the difference between humans and other animals, which is also evidence of their intelligence.