Answer:
Dolphins are famous among people because they are graceful and beautiful creatures. Their incredible performance while jumping in the ocean and their friendly face have made people like dolphins.
However, probably the most attractive feature that has made dolphins very appealing to humans is their intelligence which has no equal in the animal world.
Dolphins communicate through a language that includes sounds with different purposes, as humans do, as well as samples of behaviors related to pleasure, fun, teaching and social coexistence. That is why some have insisted on considering them “non-human people,” which gives them a little more “special” treatment.