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Tusks' appearance and differentiation
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At the age of one year, the young walrus has tusks which measure 1in (2.5cm) but remain hidden by the labial fold until the age of two when they begin to be perceptible like in this picture. They then grow continuously until reaching 3.2ft (1m) and 13.2lbs (6kg) in some old males. Those of females are shorter, thinner and less straight. Their section is less elliptical than those of males.
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