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5 live Science presenter and ‘Naked Scientist’, Kat Arney, revealed the surprising brain power of fish, with memories of much more than the three seconds suggested by popular urban myth. Evidence suggested fish could recognise their owners, other fish in their tank and these memories last for month. Kat explained scientists are training fish to go to different parts of a tank to find food and recognise different types of music. This clip is originally from 5 live Science on Friday 27 November 2015.