Jeff Corwin embarks on an amazing journey along the Mae Klong River in Thailand to see the elusive and mysterious freshwater giant stingray. Collaborating with local scientist Dr. Nantarika Chansue, Jeff and the team catch a huge 800-pound stingray for their research and monitoring project that shatters world records. During the health exam, the team discovers this stingray is pregnant ensuring future generations of this amazing species.