Ruins of Roman Fish Processing Factory (IMAGE) University of York Caption Aerial view of some of the fish-salting tanks (cetaria) in the ancient Roman city of Baelo Claudia, near today's Tarifa in Spain. The largest circular tank is 3 meters wide, with a 18m3 capacity. These tanks were used to process large fish, particularly tuna. This study supports the possibility that they could have also been used to process whales. Credit D. Bernal-Casasola, University of Cadiz 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.