Joan Holt, University of Texas at Austin (IMAGE) University of Texas at Austin Caption Dr. Joan Holt is the associate director of the Fisheries and Mariculture Lab at the University of Texas at Austin Marine Science Institute in Port Aransas. She's done pioneering work in the field of marine aquaculture, and has helped launch a movement to change the way that fish are raised and sold for saltwater fish tanks. Credit Scott Holt 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.