1, killer whales are usually smaller, with a body length of 5-9 meters and a maximum of 10- 12 meters. The figure is slender, the back is black or taupe, and the abdomen is white or light gray. Black whales have obvious beaked noses and strong bodies, while whales are bigger. Common whales such as blue whales are the largest animals in the world, with a body length of more than 30 meters. Whales are chubby, gray or blue-gray, and there are no beaks on their heads.

2. Black whales are classified as dolphins, carnivores and mainly feed on fish, marine mammals and arthropods. Black whales hunt in groups, usually in teams, while whales belong to cetaceans and mainly feed on plankton, such as zooplankton and phytoplankton. Whales usually use huge feeding organs to filter food in the water.