(IMAGE) Max Planck Institute for Chemical Ecology Caption Mozambique tilapias (Oreochromis mossambicus): a dominant male (above) and a female (below). Credit Olinda G. Almeida / Peter C. Hubbard, Centre of Marine Sciences (CCMAR), University of the Algarve, Faro, Portugal 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.