Page last updated at 00:38 GMT, Wednesday, 12 November 2008

Diving with hunting squid

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Close-up, underwater footage of Humboldt squid hunting for fish.

Red flashes are spotted, which may be a form of squid communication.

The BBC Oceans series starts its run on BBC Two at 2000 GMT, Wednesday 12 November. You can also hear an interview with Dr Karina Acevedo-Whitehouse on Science In Action from Friday

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