Bottlenose Dolphin Tursiops truncatus.
This is one of a pod (group) of 6 dolphins that were riding the bow wave created at the front of our ship during a recent Arabian Sea expedition. Bottlenose dolphins, though presumed to be abundant, are not clean out of trouble- they are captured in large numbers for display in oceanaria, marine theme parks and even circuses. This has led to their ecological status being questioned in recent times.
Canon 500D, 18-55mm
This is a very large crop of a single individual from an originally wide image with 3 to 4 dolphins in the frame (hence the quality loss); this image was created specifically for ID purposes. Will share the wide composition shortly.