1. Dolphins are very intelligent animals with very high IQ. The weight of dolphin brain is basically the same as that of human beings, and there are many folds in the brain, which shows that their brains are relatively developed and their IQ is relatively high. Some researchers have even studied the IQ index of dolphins, and their IQ is one of the higher among mammals.

2. The high IQ of dolphins is reflected in many aspects. For example, they can communicate with humans. After some training, dolphins can perform many programs. In the aquarium, dolphins can often be seen performing acrobatics such as basketball, high jump and singing, and some can even complete more complicated artistic activities. Dolphins are very friendly to humans. If a human accidentally falls into the water and meets a dolphin, it may lift the human to the shore. Some researchers also found that the high IQ of dolphins is also reflected in their own language system, and they use special sounds to convey information during communication.