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Males (in rare cases females as well) have pharyngial sacks that act like resonating chambers for the sounds emitted frequently during the mating and at diving. Because of these sacks, walruses can float in the water in vertical position, with the head above the water.They have air sacks in their throat to keep them afloat and not drown while sleeping on the waters surface.

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Geoffrey Huels

Lvl 13
3y ago

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