Found the information: black whale (killer? Whale) is sometimes called Orca or Grampus in English. It is a large toothed whale, with a body length of 8 ~ 10 m and a weight of several tons. Its back is black, its abdomen is gray-white, its dorsal fin is bent as long as 1 m, its mouth is slender, its teeth are sharp, its temperament is fierce, it is a carnivore, and it is good at attacking prey, and it is the natural enemy of penguins, seals and so on. Sometimes they attack other whales, even great white sharks, which is called the overlord of the sea. Because of its fierce temperament, it is also called killer whale, evil whale, killer whale, killer whale and killer whale.