Gilthead Sea Bream 02 (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Changes of the oxygen isotopes in the crushing teeth as well as the fish body mass over the last 10,000 years: From the Late Bronze Age, the sea bream originated from the hypersaline Bardawil lagoon but their body mass was smaller than before, which is an indication of intensification of fishing. Credit ill./©: Thomas Tütken, JGU Usage Restrictions This image may only be used in connection with the press release "Extensive trade in fish between Egypt and Canaan already 3,500 years ago", issued by Johannes Gutenberg University Mainz on October 15, 2018. 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.