Thousands of jellyfish were spotted rising to the surface of the sea off Vietnam's east coast.

The video, shot in Quang Ninh on February 25, shows a school of jellyfish swimming near the water's surface.

The longtime seafarers said jellyfish floating to the top of the seawater was a sign of water's temperature rising and a possible drought in the near future.

Video captured the moment of Thousands of jellyfish floating to the sea surface in Quang Ninh, Viet Nam.
According to the fisherman, he was moving to the sea when he suddenly met a flock of jellyfish floating on the sea surface. Jellyfish flocks floating on the water. This was the first time he had seen such large and numerous jellyfish. The jellyfish emerged and followed the boat.
Longtime seafarers said that the jellyfish floating signaled rising sea water temperatures and a possible drought in the near future.