Humpback Whale "Hancock"
Megaptera novaeangliae

f20 @ 1/1250s, ISO:1600, Nikon D3S w 300mm

"Humpback Whale," Wikipedia, the free encyclopedia. The varying patterns on the tail flukes are sufficient to identify individual humpback whales. Special thanks to Laura Howes, Director of Marine Education & Conservation, Boston Harbor Cruises, with assistance in identifying the whale.
Stellwagen Bank National Marine Sanctuary, Massachusetts