The Animal That Doesn't Breathe: Henneguya salminicola
2025-03-17
Scientists have discovered Henneguya salminicola, a parasite and the only known animal on Earth that doesn't breathe. This parasite, which lives in fish and underwater worms, lacks the mitochondrial genome—the crucial DNA responsible for respiration—found in all other multicellular animals. Research suggests this minimalist genome, shedding most multicellular traits like tissues, nerve cells, and muscles, evolved for rapid reproduction. While its energy acquisition method remains unclear, researchers hypothesize it may directly obtain energy from its host. This discovery challenges our understanding of animal evolution and fundamental life requirements.
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