page_title: Anaerobic organism
hierarchical_section_title: Anaerobic organism
caption_attribution_description: English: Light microscopy image of the undescribed species of Spinoloricus (Loricifera; stained with Rose Bengal). Scale bar is 50 μm.
context_page_description: An anaerobic organism or anaerobe is any organism that does not require oxygen for growth. It may react negatively or even die if free oxygen is present. In contrast, an aerobic organism is an organism that requires an oxygenated environment. Anaerobes may be unicellular or multicellular.
context_section_description: An anaerobic organism or anaerobe is any organism that does not require oxygen for growth. It may react negatively or even die if free oxygen is present. In contrast, an aerobic organism (aerobe) is an organism that requires an oxygenated environment.  Anaerobes may be unicellular (e.g. protozoans, bacteria) or multicellular.
caption: Spinoloricus nov. sp., a metazoan that metabolises with hydrogen, lacking mitochondria and instead using hydrogenosomes.
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