A diver stumbles across a whale shark trapped in a commercial fishing line in a marine sanctuary that bans fishing. Seemingly sensing the diver is there to help, the giant fish lies still while the rope is cut. Unfortunately, accidental entanglement in fishing gear is a major threat to many already endangered marine species.
The Revillagigedo Islands, about 200 miles off the coast of Mexico, may not look like much on the surface, but beneath is one of nature's best-kept secrets: a home to some of the greatest concentrations of fish in the world. This is the only natural juncture for miles in an otherwise empty Pacific Ocean, and a crucial area for migrating sharks and other apex predators. Enter a world where whitetip sharks share living quarters with giant lobsters, humpback whales breed and thrive, and scavengers like mantas and tuna feast on plentiful bait.
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