Dolphins are marine mammals of the order Aquaculture that are closely related to whales and boars. Dolphins' bodies have gradually adapted to living in water over millions of years. Dolphins and other aquatic animals have fins to move in the water, and their tails act as propellers. Their body is also such that it is suitable for swimming as fast as possible in the water and staying in it for a longer period of time with one breath. The need to develop advanced neural systems for echo detection in water has led dolphins to acquire larger, more complex brains. Such a thing has given them high perceptual abilities, which has led to the emergence of a kind of diagram culture among some of them.