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 Encyclopedic Entry

Best For
5 - 12 and up

Earth Science, Geography

Appropriate For

  • Educators
  • Families
  • Students

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