Weight of a jellyfish

Jellyfish weigh anywhere from a few milligrams to more than 200 kilograms (440 pounds). The weight of a jellyfish is about the same as the weight of the water that its body displaces and depends on the size of the animal. There are almost 3,000 known species of jellyfish with their sizes ranging from a few milliimeters to more than 2 meters in diameter, not including their tentacles.