The ‘megafish’ living in southeast Asia’s Mekong River once faced extinction. A new rapid response system is helping reverse their dire outlook.

Nat Geo Explorer Zeb Hogan has spent decades asking the question. “I thought there would be a simple answer,” he now concedes, after recording a 661-pound stingray. “I was wrong.” Scientists tag and ...

Zeb Hogan is looking for big fish – bigger than Tahoe’s 25-pound Makinaws, bigger than the record size 41-pound Lahontan cutthroat trout caught in Pyramid Lake. He’s looking for megafish: six feet ...