Ocean currents can carry living organisms, such as this germinating coconut seed, to keys and coral islands. Plants such as hardy coconuts and animals such as reptiles can survive long journeys without water or nutrients.

Photograph by Ethan Daniels, MyShot
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key
key Encyclopedic Entry

Best For
5-12+

Subjects
Religion, Geography, Science

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A key is a small, low island of ancient coral reef