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Page last updated at 00:07 GMT, Monday, 9 November 2009

Manta ray's secret life revealed

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The once secret life of a huge, recently discovered species of manta ray has been unveiled.

Biologist Dr Andrea Marshall has discovered that the giant fish, which she first described as new to science last year, undertakes huge journeys.

As well as making the longest migration known across the Indian Ocean, the fish gathers in huge numbers to feed and survives attacks by sharks.

In this clip, manta rays gather in a spectacle never seen before.

Andrea: Queen of the Mantas will be broadcast on BBC Two at 2000GMT on Wednesday 11 November as part of the BBC Natural World documentary series.

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