Asian Short-Clawed Otter

This photo was taken at Five Sisters Zoo, West Calder, West Lothian during August 2009.
The technical information is as follows.
Camera - Canon EOS 50D
Shutter speed - 1/400
Aperture - f5.0
Lens - Canon EF 300mm f4.0 L IS USM
Focal Length 300mm
ISO 400