A three-spined stickleback (IMAGE) Swansea University Caption A three-spined stickleback (Gasterosteus aculeatus) Credit Dr Andrew King, Swansea University Usage Restrictions None 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.