Adult humpback whale (Megaptera novaeangliae), flukes-up dive at Siglufjorour, Iceland

humpback whale megaptera novaeangliae iceland marine life ocean wildlife diving behavior cetaceans nature aquatic surface sea watching biodiversity environment conservation splashes fins blue water skilled swimmer underwater dorsal fin large mammal ecosystem majestic creature northern waters biology oceanic peaceful graceful natural habitat exploration research fish fluke surfacing activity wild serene