Distribution
The Dusky Dolphin resides in the coastal waters of the Southern Hemisphere. The best known locations for them include New Zealand, the Southern region of Australia, The Southwest area of Africa, and in Tasmania. There are small populations of this dolphin living along the Western coast of South America.
They are coastal and can be located around both the slopes and the continental shelves. They stick to the warmer regions, but from time to time they have been found living in cooler temperatures as well.
Behavior
The Dusky Dolphin is very social, and their pods can be more than 1,000 members. However, it is more common to find them in much smaller numbers. They typically will range from 20 to 500 members. It is believed that the larger numbers come together for feeding and that there are plenty of subgroups within a larger pod. This allows a level of hierarchy to work for them that can be difficult for observations to fully identify.
They are very acrobatic and can be seen leaping out of the water. They are known to tumble in the air. They are also commonly found approaching boats so that they can bow ride. Playing and leaping are types of activities they often take part in as they socialize. They can swim very fast too. Communication includes the use of squeals, clicks, whistles, and squeaks. They are loud sounds and can be heard almost 2 miles away when they occur while the dolphins are out of the water.
(source:google/http://www.dolphins-world.com/)
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