The Nomura jellyfish is a very large Japanese jellyfish.
It grows 2 meters (6 feet 7 inches) in diameter and can weigh up to 220 kg (about 450 pounds).
A 10-ton fishing boat has been sunk by the gigantic jellyfish off eastern Japan. Fishermen Trawler, Diasan and Shinsho-Maru, were killed as the three-person crew tried to trip a net containing dozens of huge Nomura jellyfish.