WILDLIFE -- Ferocious Midnight Hunter: The Brown-Marbled Grouper of Bali

As night falls off the coast of Bali, a mysterious "monster fish" comes out of hiding. The fierce-looking creature is so powerful it can break coral. And it has a hunting technique that is both dynamic and aggressive. The Brown-marbled grouper tracks down its prey and then uses a powerful suction to draw it into its overly-large mouth. What's also interesting is that it teams up with moray eels to hunt, something referred to as the Sea Gang. This successful, symbiotic relationship relies on the strengths of one organism to make up for the weaknesses of the other. This episode immerses viewers in an undersea world, revealing the wonders inside a sunken ship found in one of the world's top diving spots.