Researchers say study, which involved training bream to follow a specific diver for treats, could change the way we treat fish

Wild fish can tell people apart – at least when they are wearing different-coloured outfits – researchers have found in a study they say could shift our relationship with the creatures.

It is known that certain domestic animals – or those that live close to humans – can tell one person from another, a skill researchers say could be tied to particular humans being more inclined to share resources with them or, conversely, pose a danger. However, such discrimination is less well known in wild animals.