In this study, positive responses were also found to be associated with dolphin watching vessels. It is still unknown why dolphin-watching vessels are attractive to dolphins. Based on the observation of some friendly actions such as spyhopping and breaching near the dolphin watching vessels, we believed that dolphin watching vessels, in general, did not scare dolphins, and the animals approached these vessels out of curiosity. The juveniles of the dolphin group tended to approach the dolphin watching vessels more frequently than the adults.