Female fish can breed a new species if they aren't choosy about who is Mr. Right

(St John's College, University of Cambridge) Female fish can breed a new species if they aren't choosy about who is Mr. Right. Fish will mate with a species outside their own if the male's colouring is attractive enough or if the female can't see him properly, according to new research. Such 'mistakes' in mate choice can lead to the evolution of new species, an international team of scientists found after they analysed the DNA of more than 400 cichlid fish.