Jeff Corwin, the conservationist and host of the ABC show "Ocean Mysteries," has found what might just be the world's biggest stingray. Photo via Jeff Corwin's Facebook page The ray, captured in Thailand's Mae Kong (Mekong) River, weighs an estimated 700-800 pounds and was over 14 feet long and 8 feet wide. Corwin released the statement: "The stingray was captured with the world's leading specialist on these animals, Dr. Ning, and the information from her study is solely for conservation." The picture captures the moment of release, and "the animal is doing well and thriving." A Mae Kong catfish currently holds the title for the world's largest fish at 660 pounds.