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A sign warns swimmers about the danger of shark attacks—Sydney, Australia. While sharks rarely attack humans, there are several things you can do to minimize your risk of being attacked:
• Don't swim early in the morning or in the evening, when sharks are most actively looking for food.
• Don't wear shiny jewelry, which looks like fish scales to sharks, or bright clothes, as sharks can see contrast easily. • Don't swim in murky waters. • Avoid areas where sharks are known to prowl, as well as areas where fishermen are using bait that could attract sharks. • Stay in groups—sharks are much more likely to attack an isolated individual. Photograph by Jeffrey L. Rotman/CORBIS
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