A gigantic fish lurking at the bottom of muddy rivers—this is the unsettling, elusive phantom Cyril has come to Thailand for; the giant stingray is arguably the largest freshwater fish on the planet.

The Bijagos—wild islands almost cut off from the world. Cyril is here in search of one of the area's most aggressive and powerful fighters, capable of snapping fishing rods: the African cubera snapper.

Weighing in at over 600 kilograms, the bluefin tuna is a true titan prowling the oceans. Cyril is recruited by a team of biologists to travel along the East Coast of the United States and Canada to catch and tag one of these giants.

In the dark waters of the Amazon jungle lives a creature armed with two monstrous fangs—a beast that could have come straight out of your worst nightmares: the payara. Cyril sets out on an expedition to find this predator.

South Africa's Wild Coast is known for deadly shark attacks, but it is also home to the powerful Kob. Catching a massive Kob turns out to be a greater challenge than Cyril expected.

Cyril finds himself in one of the most remote and dangerous places on Earth, in search of Africa's largest freshwater fish—the Nile perch, a massive beast with a gigantic mouth.

Cyril has heard unsettling stories about people being accidentally injured or even killed by the massive leaps of Gulf sturgeon. Its even larger cousin, the white sturgeon, is the largest freshwater fish in North America.

The United States is home to extreme regions that seem otherworldly. Louisiana is one of them. And in this vast swamp, one finds monsters—scaly ones, but not only that.

If there is a legendary fish—capable of reaching weights of over 500 kilograms and accelerating to nearly 80 km/h—it is the marlin; and that is precisely the fish Cyril came to seek on Costa Rica's Pacific coast.

Nicaragua's Caribbean coast is a wild, untamed region; fortunately, it is also home to enormous fish—among the most powerful in the world—that are highly sought after by extreme anglers: the tarpon.

Cyril heard about the incredible story of Parker, a young fisherman who was viciously bitten by a barracuda in the Florida Keys; after meeting him, Cyril heads into the wild waters of the Gulf of Mexico.

Cyril is heading to the Bahamas, and this time he has a date with giant sharks—monsters nearly five meters long; he will be helping a team of scientists get a closer look at these beasts to better understand their behavior.