Blue Whale Pigmentation Patterns (IMAGE) NOAA National Marine Fisheries Service Caption Identification of blue whales was made by pigmentation patterns on the back and shape of the small dorsal fin. Credit Alexei Calambokidis, Cascadia Research Collective Usage Restrictions Please Credit 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.