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Some guppies are braver than others

Did you know that fish have personality? In fact they have complex personalities - according to new research carried out on tiny fish called Trinidadian guppies. Lead researcher, Dr Tom Houslay from Exeter University in the UK, explains how he carried out his research.

(Photo: Guppy (bottom left) and a blue acara cichlid fish (bottom right), and a model heron. Credit: Tom Houslay)

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1 minute