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large grayish seal with dark spots that is found in open waters of the North Atlantic and Arctic oceans. Hooded seals range from the Svalbard archipelago and the Barents Sea to the Gulf of St. Lawrence. Average-sized adult males measure about 2.6 metres (8.5 feet) long and typically weigh between 300 and 400 kg (660 and 880 pounds), whereas average-sized females measure 2.2 metres (7 feet) and weigh between 160 and 230 kg (350 and 500 pounds). Hooded seals are named for the nasal ornamentation occurring in sexually mature males. Hanging like a wrinkled sac when relaxed, the appendage can be inflated to become a hood that covers the front of the face and the top of the head. Adult males also have an elastic nasal septum that can be inflated to become a reddish balloon in front of their face. These two unusual features have a role in attracting females and, when competing for females, advertising strength to other males