Egg sac cover (IMAGE) Harvard University Caption Four squid embryos in their egg sac. These are the squid species Doryteuthis pealeii. Credit Kristen Koenig 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.