Turtle
A reptile of the order Testudines whose trunk is enclosed by an upper and a lower shell, living in marine, freshwater, and terrestrial habitats.
Some turtles breathe through their butts. Australia's Fitzroy River turtle has gill-like, blood-rich bumps inside its cloaca — the opening used for waste and reproduction — and pumps water through it to absorb oxygen. It gets up to 70% of its oxygen this way.
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