Two Males Squaring Off (IMAGE) Stanford University Caption This composite illustration made from two separate photos illustrates the fighting phase of the study, when the female (upper left) watches the piscine pugilism of two brightly colored males (foreground) battling for her affection. Credit Todd Anderson Usage Restrictions Image may not be altered or sold for profit and must be credited to Todd Anderson. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.