The image shows a close up of a piece of coral on a table next to a ruler, with a paper with some text on it placed on the surface.
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The image shows a close up of a piece of coral on a table next to a ruler, with a paper with some text on it placed on the surface. The coral appears to be a brachiopod, a type of sea anemone, and the ruler is likely used to measure the size of the coral.