Scientists from the James Cook University in Australia studied black-saddled puffers in special tanks called " respirometers" , which can measure how quickly fish respire oxygen.
To live in this environment, some bacteria have adapted to produce enzymes that still function at very high temperatures, and others even respire nitrogen instead of oxygen so they can tolerate anoxic conditions.
We deferred our excursion till the afternoon; a golden afternoon of August: every breath from the hills so full of life, that it seemed whoever respired it, though dying, might revive.