A mock up handout image released by the University of Exeter on September 25, 2017 shows a Trinidadian guppy (small fish), a blue acara cichlid and a model of a heron. "AFP PHOTO / UNIVERSITY OF EXETER / TOM HOUSLAY"
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Fish have complex individual personalities, a British university study found in research published Monday.Scientists from Exeter University in southwest England studied how individual Trinidadian guppy fish behaved in various stressful situations and discovered wide differences in how they responded.The researchers studied the guppies' coping strategies in situations that were designed to trigger various levels of stress.The tiny guppies were individually transferred to an unfamiliar tank, to create a mild level of stress, while a higher level of stress was caused by adding models of predatory birds or fish.
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