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Bioluminescent Organisms, Japan

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The transparent shells of tiny Cypridina hilgendorfii, found in the coastal waters and sands of Japan, hold a creature that emits a luminous blue substance when disturbed. During World War II, the Japanese harvested these creatures for soldiers to use when reading maps and messages at night.

(Photo shot on assignment for "Nature's Night Lights—Probing the Secrets of Bioluminescence," July 1971, National Geographic magazine)

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Photograph by Paul A. Zahl

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Long Exposures

When making long exposures, use a remote release to avoid camera movement. If you don't have a remote release, use the camera's self-timer.

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