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Last Updated: Tuesday, 29 August 2006, 11:44 GMT 12:44 UK
Survey reveals dolphin sightings
Bottlenose dolphin
The number of sightings can act as a warning of marine trouble
An encouraging number of harbour porpoises have been spotted around the coast of Devon and Cornwall.

The National Whale and Dolphin Watch said sightings had been particularly good off north Devon.

The Sea Watch Foundation, which carries out a survey every year around the UK, says several bottlenose dolphins have also been seen.

The survey included the sighting of a 20-strong pod of common dolphins near the Isles of Scilly.

The foundation says maintaining a record of the whale and dolphin population can help to provide a warning of potential problems in the marine environment.

About 28 species of whales and dolphins have been recorded in the past century in UK waters.




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