Breathing oxygen is seen as a fundamental characteristic of multicellular animals, but we have found at least one that can’t do it.
It has lost the ability to breathe oxygen, and it remains a mystery how this animal, (a parasite that infects salmon), gets the energy it needs without oxygen; but it probably steals it from its host.
All plants and animals were thought to use oxygen to generate a fuel called adenosine triphosphate (ATP), which powers cellular processes. The generation of ATP from oxygen takes places in structures called mitochondria.
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Ummm ... I’m pretty sure it has been determined that several species of animals that populate deep sea volcanic vents were not “users of oxygen” either ... but I haven’t looked into it recently
Bay0Wulf
Level 8
Feb 25, 2020
0
Like the bacteria that metabolise sulphur and co2 releasing oxygen as a waste product?!
@BikerPetehall70
Well, microbes and bacteria (another type of microbe) do qualify as “animals” and some are even multicellular however there was a pretty in depth paper about oceanic vents and I’m pretty sure they were speaking in terms of some that were more “advanced”.
I’m pretty sure it was in one of my paid subscription sites of scientific journals and papers but it was awhile ago ... which is why I said that I’m “pretty sure”
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