Humpback Whale Fluke (image) NOAA National Marine Fisheries Service Caption A humpback whale shows its fluke off Hawaii. An individual's fluke has distinctive markings and coloration. Credit HIHWNMS NOAA Fisheries Permit #782-1438 Usage Restrictions All photos must be credited to: HIHWNMS NOAA Fisheries Permit #782-1438 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.