First Animals Found That Live Without Oxygen

loricifera

In the muck of the deep Mediterranean seafloor, scientists have found the first multicellular animals capable of surviving in an entirely oxygen-free environment.Some types of bacteria and other single-celled organisms can live without oxygen, but nothing as complex had been found as these three species of Loricifera, a group of marine-sediment dwellers who inhabit one of Earth’s most extreme and little-known environments.

“The discovery of these life forms opens new perspectives for the study of metazoan life in habitats lacking molecular oxygen,” wrote researchers led by Roberto Danovaro, a marine biologist at Italy’s Polytechnic University of Marche, in a study published April 6 in BMC Biology.
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