Mysterious underwater vortex filmed in Thai lake

© YouTube Screen Capture

A mystery vortex filmed swirling around in a lake in Thailand has left witnesses baffled.

The whirlpool was spotted in the aqua blue waters of Cheow Lan Lake, a dammed reservoir in Khao Sok National Park in the Surat Thani Province, and lasted for about two minutes.

The swirl left a long, wide trail of white bubbles as it moved through the water in a seemingly random figure-8 path in the video published on YouTube (watch video below) last week.

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"Strange events that make us feel very confused," wrote YouTube user Wutpink Sukanya.

"But I can not explain What happened was that the The phenomenal natural or caused by sea creatures swimming below the surface (sic)," they wrote.

The video has reportedly been sent to Seoul, South Korea, for analysis but the witness wrote they have already received some criticism from sceptics.

It's not certain whether the underwater vortex was caused by a living creature or a sinkhole somewhere deep below the surface.