|Bottlenose Dolphin (Tursiops truncatus)
|Great Blasket Island, Co. Kerry, Ireland
The Bottlenose Dolphin is distributed in every ocean with the exception of the Arctic and Antarctic Oceans.
They are dark grey above and light grey to almost white below.
They feed on fish and other small marine animals which they find using echolocation.
There is an excellent page with lots of information on this species at Wikipedia.