Dolphins probably rank among the most intelligent marine mammals.
The bottlenose dolphin gets its name from its bottle-shaped snout. The exact worldwide population of the bottlenose dolphin is not known. In the eastern tropical Pacific the population is estimated to be 243,500, while in the waters of Japan the population estimates are as low as 37,000. Bottlenose dolphins often live 30 to 50 years. Dolphins can be found in both the Pacific and Atlantic Oceans.