海豚是一种智慧动物，它们有着灵敏的感官和高度的社交能力。它们能够通过发出多种声音来与同伴交流，并且能够在水中迅速游动。在海洋中，它们常常被认为是友好的生物，与人类建立起了紧密的联系。

Dolphins are intelligent animals with sensitive senses and highly developed social skills. They can communicate with each other by making various sounds and can move quickly through the water. In the ocean, they are often considered friendly creatures and have established a close relationship with humans.