October 9, 2009 10 min
Overview
Jonathan travels to Holbox, Mexico in search of the massive whale shark—the world's largest fish. Reaching 50 feet long, these animals grow larger than a school bus, but they are completely harmless since they eat only plankton and small fish. Jonathan gets up close and personal to a mouth the size of a small car in his investigation to discover why so many whale sharks visit Holbox every summer.
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