The marine mammals of the open waters of the Arctic Ocean...
Balaenoptera physalus, 'Fin Whale', (Ilulissat, Greenland).
Megaptera novaeangliae, 'Humpback Whale' with small curved fin atop 'humped' back, (Ilulissat, Greenland).
The tail (fluke) of the 'Humpback Whale' is usually seen when the animal is diving (Ilulissat, Greenland).