Cyril and the team set out on a mission to help conserve one of South America's last remaining river giants, the rare and dangerous short tailed river stingray, feared by locals for its razor sharp charm laced with agonizing venom. One of the biggest stingray species in the world, the short-tailed river stingray can grow as large as an adult human; over five feet in diameter and weigh over 400 pounds. But despite their massive size, they face many challenges caused by human activity. This is from Wild Fish.