ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Underwater biological research. Marine biologist scuba diving to assess the state of an artificial reef. Coral and other underwater animals and plants will colonise ship wrecks and other artificial structures. These artificial structures may be deliberately placed to help form such an ecology. Photographed in the marine section of Port-Cros National Park, off the coast of Port-Cros Island, France, in the north-western Mediterranean Sea.
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