Adult blue tang fish swimming in captivity at the UF/IFAS Tropical Aquaculture Lab. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

Credit: UF/IFAS Photo, Tyler Jones The blue tang exemplifies why saltwater ... On reefs, marine fish thrive on live zooplankton, which are difficult to grow for food, he said.