Powder Blue Tangs (IMAGE) Wildlife Conservation Society Caption A study on the recovery rates of fishes in exploited reef systems on the coast of Kenya found that some species, such as the powder blue tang, may need decades to recover to pre-fishing levels. Credit Tim McClanahan/Wildlife Conservation Society Usage Restrictions One-time usage allowed with photo 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.