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The Humpback whale is a species of baleen whales. The adults range in length from 39 to 52 ft and weigh approximately 79,000 lb. The humpback has a distinctive body shape, with unusually long pectoral fins and a knobby head. The humpbacks are known for their breaching and slapping the water with its tail and pectoral fins.
The sighting was made at the entrance to Icy Strait while leaving Lynn Canal near Rocky Island in Alaska.