Male Trinidadian Guppies (IMAGE) University College London Caption These are two male Trinidadian guppies, showing the range of color patterns observed in the population. Credit Dr Jake Morris (UCL Genetics, Evolution & Environment) Usage Restrictions With credit 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.