ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Coral polyps. Close-up of the individual polyps (round) that make up a coral colony. Coral (class Anthozoa) is a colony of these individual tiny invertebrate animals living within a calcium carbonate skeleton, which gives the coral its shape. Photographed in the Indian Ocean, Maldives.
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