Evolving Pupfish (1 of 2) (image) University of California - Davis Share Print E-Mail Caption In lakes on the island of San Salvador, Bahamas, pupfish like this one show rapid evolution to exploit new diets. UC Davis graduate student Chris Martin has bred hundreds of hybrid fish to understand the process. Credit Chris Martin/UC Davis Usage Restrictions May be used with acknowledgement of the source. Share Print E-Mail 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.