Dolphins belong to aquatic mammals. Their appearance is spindle-shaped and their appearance is relatively smooth. Swimming is also flexible and fast. Dolphins are also very good at jumping and swimming. Most aquatic animals are not as fast as dolphins. Although dolphins have the same body structure as fish, their habits and breeding methods are different from those of fish. Moreover, dolphins have very good IQ and memory. Through human training, they can make many movements. In addition, dolphins are gentle in character and have a natural affection for human beings, which is loved by many people.

1. Different breathing modes: Dolphins and fish have different breathing modes. They breathe with their lungs and need to float to the water regularly for ventilation. When they breathe, they first use their nose and mouth to exhaust the exhaust gas from their bodies, and then breathe in a lot of fresh air into their lungs, so most dolphins like to move in shallow water.

2. Different ways of reproduction: Dolphins and fish reproduce differently. They are viviparous animals. When dolphins breed, they mate first, and after successful mating, the embryo will develop in the mother for 11 months. Only when the embryo is mature will the baby dolphin be born. After birth, the baby dolphin will rely on the milk of the female dolphin to survive, and the female dolphin will accompany the baby dolphin until they learn all the survival skills.