Sea Stars (image) University of California - Davis Share Print E-Mail Caption The sea stars Cryptasperina hystera and C. pentagona are close relatives with very different ways of reproducing. Pentagona is a broadcast spawner, and hystera broods its young internally. A new study shows the species separated just a few thousand years ago. Credit Credit: Jon Puritz, University of Hawaii at Manoa Usage Restrictions May be used with acknowledgment of the source. 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.