Common Dolphin in sea
Media playback is unsupported on your device
Video

Why the Common Dolphin is becoming more common

Despite its name, the Common Dolphin was once a fairly rare sight in the waters off the west coast of Scotland, but now their numbers are increasing.

Marine researchers are trying to find out why the dolphins are thriving in the Hebrides.

The BBC's John Maguire joined a scientific survey to find out more.

  • 28 May 2015
Go to next video: In search of Myanmar's rare dolphin