Large Herring, size comparison (IMAGE) Uppsala University Caption A comparison of the fast-growing fish-eating Baltic herring (Slåttersill in Swedish) and slow-growing plankton-eating spring- and autumn-spawning Baltic herring. Photo: Leif Andersson. Credit Leif Andersson/Uppsala University Usage Restrictions Credit must be given to the creator. License CC BY 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.