![The black animal in the center of the picture is a deep sea holothurian, or sea cucumber. The circular patterns of indentations (four in this picture) are known as ‘fairy rings,’ but no one has ever seen what animal actually makes them.](10.jpg)
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The black animal in the center of the picture
is a deep sea holothurian, or sea cucumber. The circular patterns
of indentations (four in this picture) are known as ‘fairy
rings,’ but no one has ever seen what animal actually makes
them.
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