The sea’s largest fish has been a mystery until recent decades. Thanks to electronic tags, researchers are uncovering some of the secrets of the whale shark (Rhincodon typus Smith, 1828). One tagged animal, dubbed “Rio Lady,” swam some 5,000 miles during a span of 150 days. Another dove to a depth of 6,324 feet in the Gulf of Mexico.

(via Tagging Along With Whale Sharks | Smithsonian Ocean Portal)

Photo: Paul Cowell

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