The reason why killer whales are called killer whales is that tigers are the king of animals in the mountains, while killer whales are tigers in the water and overlords in the water. It is the largest species in the dolphin family of Mammalia. Its body is spindle-shaped, its surface is smooth, and its color is black and white. It has complex social behavior, hunting skills, and even can communicate with sound, so it is a relatively intelligent animal, which also provides convenience for them to dominate the ocean.

1. Migration: Killer whales at high latitudes will migrate long distances. In Antarctica, some ecotypes of killer whales enter ice floes in search of prey, while others hunt in the open air. In some places, killer whales also migrate seasonally, gathering in coastal waters for food, and occasionally entering estuaries.

2. Colony: Killer whales are highly social animals and like to live in groups, usually with small groups of 2-3 animals and sometimes even large groups of 40-50 animals. Usually a population will have 20% mature males, 20% young whales, and 60% females and immature males. Killer whales can also teach their offspring how to hunt.

3. Swimming: Killer whales can swim 160 kilometers a day. In the shallow waters of the bay, they like to hook and pull seaweed with their tails. Its fastest speed can reach 55 kilometers per hour. It is curious about ships and occasionally runs aground or gets trapped in the bay.

4. Sound: Killer whales can make three kinds of sounds, namely whistle, call and click. Through whistles and calls, killer whales can communicate with each other, while clicks are mainly used for echolocation. In addition, it can look for fish schools through echoes.