Nobody seems to be quite sure what this weird fish is after it stunned fishermen who caught the creature in Thailand.

A video of the animal is going viral online and people are posting their thoughts about what the bizarre fish could be.

One of the most popular guesses is that it is a type of river-faring batfish, a species that is usually found in warm and temperate seas.

What's this fish? A bizarre fish that appears to have legs has been caught on video in Thailand

In the video fisherman can be seen dangling the creature on the end of a line after they had caught it with a rod from a bridge over a river.

They do not appear to have any clue about what they have found.

A big clue that it might be a batfish is that the animal looks like it has legs and a long tail.

Which fish has legs? The most popular guess is that the creature is a batfish, a species that uses its pelvic fins as hands and appears to walk

Batfish are known as a species that appears to walk on its limbs, using pelvic fins as hands to creep along the sea bed.

The creatures, closely related to the frogfish, have been captured crawling slowly on 'all fours' before.

They generally do not grow larger than 14 inches, and when they are threatened they bury themselves into the sand.

One of the puzzled fisherman uploaded footage of the catch to LiveLeak.