Tilapia (IMAGE) Wildlife Conservation Society Caption The poster child for sustainable fish farming -- the tilapia -- is actually a problematic invasive species for the native freshwater fish species of the Fiji Islands. Credit Aaron P. Jenkins Usage Restrictions For one-time usage only. Must use photo credit (Aaron P. Jenkins) 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.