Do you know that some of the most intelligent mammals of the world are found in the oceans? Marine mammals have exhibited remarkable abilities to communicate and learn. Like other mammals, marine mammals all have warm blood, depend on air to breathe and produce live young that feed on milk. What makes them different is that they have adapted to life in the sea.

Four of these amazing creatures, namely the Indo-Pacific bottlenose dolphin, the Indo-Pacific Hump-backed dolphin [also known as the Pink dolphin], the Finless Porpoise and the Dugong, are illustrated in this delightful stamp issue on marine mammals.