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Meet Henneguya Salminicola: The Only Known Multicellular Organism That Can Live Without Oxygen

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H. salminicola is the only known multicellular organism to be able to survive without oxygen (Credit: Stephen Douglas Atkinson)

Though many single-celled lifeforms have evolved to survive without oxygen, multicellular organisms have always been believed to need it to live. Now, scientists in Tel Aviv, Israel, have found that Henneguya salminicola, a parasite, which spends its life attached to the muscle tissue of fish, has adapted to living without oxygen.