Fishies (image) Penn State Caption Setting up an aquatic playground with rocks and artificial plants in a fish hatchery tank made fish smarter, according to Victoria Braithwaite, professor of fisheries and biology. Researchers discovered when fish were raised in the enriched tank, parts of their brains changed and they could escape from a maze quicker than fish raised in standard tanks. Credit Anne Gro Salvanes Usage Restrictions Non commercial use only 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.