Seal Mother and Pup Pair (IMAGE) University of Alberta Caption Christi Bubac studied grey seals like this one on Sable Island, where the world's largest colony of 400,000 grey seals come to give birth and breed every winter. Credit Christi Bubac Usage Restrictions with credit to Christi Bubac 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.