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A large sack of glabrous skin which protrudes from the lower mandible in certain animal species. Zoologists speculate that it is most commonly used to store more food that is needed for survival, though is also recorded to be used as housing for newborns in some species. Animals most famous for the use of their tuj are: The lesser gaelic hamster, African tree goats and several members of the deciduous pygmy possum.
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