It is so big that it has got fishing boats to capsize.
It hovers gracefully through the water outside Echizen in Japan. And it is undoubtedly a powerful sight for divers who encounters it.
The jellyfish is called Nomura and is the largest nettle animal in the world, a hundred times larger than an average jellyfish.
Although it is difficult to determine from the picture how far away diver is, it is clear that it is huge.
According to the photographer the jellyfish is a meter and a half in diameter.
The pictures are taken by Brazilian Lucia Terui, on a diving expedition in the Echizen Fukui Province on the west coast of Japan.
- It was one of my very first dives, and I had the privilege of swimming with this majestic jellyfish, she says.
The Nomura jellyfish can be even larger than the one Terui met. The largest has a diameter of two meters and weigh up to 220 kg.
In 2009 a ten-ton trawler capsized when the crew of three tried to pull in a net with twelve Nomura jellyfish in it. All three survived.
The Nomura is toxic, but even if it is very painful to be burned, it's not directly lethal to humans. However, according to the website Jellyfish Factsheet, some unfortunate swimmers have been killed by giant jellyfish.
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