A giant stingray has been caught in the Mekong River, in Cambodia.
Scientists believe that the ray is the largest freshwater fish ever recorded.
At four metres long, it is more than double the length of an average human and weighs 300kg.
It took about 12 people to move the fish, which has now been tagged and released back into the river.
The team tagged the fish so they could track its movements and behaviour.
The Mekong River flows from the Tibetan Plateau through China, Myanmar, Thailand, Laos, Cambodia and Vietnam.