Hundreds of mystery bugs were seen creeping in a fishing net after it was pulled out of the water.
Footage was taken by Sathaporn Chuenjai while he was collecting fish from his farm in Surin, northeastern Thailand on April 24.
Sathaporn said: "I was totally curious about the creatures I found in my pond. None of my friends could identify what they are."
The farmer posted to the video online in search of nature experts who could help identify the creatures, but nobody knew what they were.
Sathaporn added: ''They look like insects but they were living underwater. I'm concerned about what else could be in there.''
The creatures were thrown back into the water.