The process of surfacing and breathing is automatic, and even a hippo sleeping underwater will rise and breathe without waking.
Xem thêmThis is why hippo calves can suckle on land or underwater.
Xem thêmThis means that we do not have the ability to breathe underwater.
Xem thêmSea otters can hold their breather underwater for more than 5 minutes, and river otters can hold theirs for more than 8!
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