The rare giant jellyfish found in the waters of Japan is one of them. It is generally 2 meters long and weighs 200 kilograms. It has densely packed poisonous tentacles that are six to seven meters long and an umbrella-shaped opening with a diameter of up to 2 meters, the tentacles are slightly toxic. They usually form groups and float quietly in the seawater, waiting to prey on suspended plants or small fish and shrimps in the water, and move with the flow of the seawater.