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School of Sea Nettles, Monterey, California, 2007

Photo: School of sea nettles

In the midst of an underwater ballet, a school of sea nettles drifts through California's Monterey Bay Aquarium. Chrysaora fuscescens is a type of jellyfish found in coastal waters from Alaska to California. The invertebrate hunts by trailing its long sting-cell-covered tentacles and ruffled mouth-arms through the water, combing for zooplankton and larval fishes.

(Photo shot on assignment for, but not published in, "Swarm Theory," July 2007, National Geographic magazine)

Photograph by Peter Essick

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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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