Of course killer whales are whales. Whales refer to animals belonging to cetaceans, including killer whales, which belong to cetaceans and dolphins, so they are whales and dolphins. In many people's cognition, whales and dolphins are not a kind of animals, but in fact, they are only different in appellation. Generally, the larger ones are called whales and the smaller ones are called dolphins. Whales are generally divided into toothed whales and baleen whales. Toothed whales are whales with teeth, and killer whales are one kind of toothed whales.

1. Structure difference: One of the great differences between toothed whales and baleen whales is their structure, and this structure is teeth. Toothed whales have teeth, but baleen whales don't. Baleen whales have baleen on their upper jaw, and their throat and abdomen are wrinkled, which can become unusually large when eating.

2. Different predation: Toothed whales and baleen whales have different predation methods due to their different structures. Toothed whales can prey on a variety of animals, such as fish, cephalopods, crustaceans and aquatic mammals. For example, dolphins feed on fish, while killer whales eat sea lions, seals and other animals. Because baleen whales have no teeth, their predation ability is weak, so they can only eat plankton. They will suck plankton together with seawater, and then discharge water.

3. Different water spraying: The nostrils of toothed whales and baleen whales are different. The nostrils of toothed whales are only one, while the nostrils of baleen whales are generally V-shaped. Because of the different nostrils, the water spraying situation is different. The water column of toothed whales tends to be inclined, short and thick, while the water column of baleen whales is vertical, thin and high.