BANGKOK (AP) — The world’s largest recorded freshwater fish, a giant stingray, has been caught in the Mekong River in Cambodia, according to scientists from the Southeast Asian nation and the United States.

The stingray, captured on June 13, measured almost four meters (13 feet) from snout to tail and weighed slightly under 300 kilograms (660 pounds), according to a statement Monday by Wonders of the Mekong, a joint Cambodian-U.S. research project.

In this photo provided by FISHBIO taken on June 14, 2022, village residents watch as a team of Cambodian and American scientists and researchers, along with Fisheries Administration officials prepare to release a giant freshwater stingray back into the Mekong River in the northeastern province of Stung Treng, Cambodia. A local fisherman caught the 661-pound (300-kilogram) stingray, which set the record for the world’s largest known freshwater fish and earned him a $600 reward. (Sinsamout Ounboundisane/FISHBIO via AP)

The previous record for a freshwater fish was a 293-kilogram (646-pound) Mekong giant catfish, discovered in Thailand in 2005, the group said.

The stingray was snagged by a local fisherman south of Stung Treng in northeastern Cambodia. The fisherman alerted a nearby team of scientists from the Wonders of the Mekong project, which has publicized its conservation work in communities along the river.

In this photo provided by Wonders of the Mekong taken on June 14, 2022, a team of Cambodian and American scientists and researchers, along with Fisheries Administration officials prepare to release a giant freshwater stingray back into the Mekong River in the northeastern province of Stung Treng, Cambodia. A local fisherman caught the 661-pound (300-kilogram) stingray, which set the record for the world’s largest known freshwater fish and earned him a $600 reward. (Chhut Chheana/Wonders of the Mekong via AP)

The scientists arrived within hours of getting a post-midnight call with the news, and were amazed at what they saw.

“Yeah, when you see a fish this size, especially in freshwater, it is hard to comprehend, so I think all of our team was stunned,” Wonders of the Mekong leader Zeb Hogan said in an online interview from the University of Nevada in Reno. The university is partnering with the Cambodian Fisheries Administration and USAID, the U.S. government’s international development agency.