Dolphins

Dolphins filmed in 'especially rare' river sighting. Video, 00:00:18Dolphins filmed in 'especially rare' river sighting

Harbour looks like dolphin - but not on porpoise

People urged to record dolphin sightings

Sunrise dolphins delight coastal walkers. Video, 00:00:15Sunrise dolphins delight coastal walkers

Arctic visitors and the dark side of dolphins

Dolphins track Strangford ferry 'like clockwork' Video, 00:00:42Dolphins track Strangford ferry 'like clockwork'

Swimmers investigated for harassing dolphins. Video, 00:00:39Swimmers investigated for harassing dolphins

Swimmers in Hawaii accused of harassing dolphins

Dolphins found stranded in city miles from sea

Oil giant accused of Australia dolphin deaths

Whale sightings could indicate population increase

Dolphins seen in NY river for first time in years

Dolphin rescuer calls for volunteer sea-spotters

Dolphins 'shout' to get heard over noise pollution

Trapped dolphin rescued by two women

Dolphin dies after two found stranded on beaches

Discovery. Wild inside: The Harbour Porpoise. Audio, 28 minutesDiscovery

Stranded dolphin rescued and returned to sea

Dead dolphin on beach 'caught in fishing gear'

Ferry sealife surveys incredible, charity says

Warning as seal pup scared by dogs on beach dies

Year-long study records whale songs off Scotland