Being among the most intelligent marine animals in the world, dolphins also proves it nearly every day.
According to volunteers, a dolphin named Mystique every time comes back with gifts from the ocean to swap with food.
Mystique brings gifts for volunteers in at the Barnacles Dolphin Centre in Queensland, Australia.
It can be stunning corals,planks of wood, old glass bottles, sea sponges.Instead of these presents Mystique gets attention and fish.
People think that the dolphin wants to clear the water of debris this way. The others suggest that Mystique just wants to communicate with people.
