One Flounder Species became Two (image) University of Helsinki Share Print E-Mail Caption Flounders with different spawning behaviors are two species with distinct evolutionary histories. Credit On the left: Mats Westerbom. On the right: Alf Norkko. Usage Restrictions None Share Print E-Mail 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.