|Lion's Mane Jellyfish (Cyanea capillata), Courtesy Foto: E. Svensen|
Nomura's jellyfish (Nemopilema nomurai ) is one of the largest species of jellyfish. It lives near to Japan and is known in Japanese as echizen kurage. They are growing up to 2m (6 ft 7 inches) in diameter and weighting up to 200kg (440 lb).
Another massive species is Black sea nettle (Chrysaora achlyos).
Source: Marinbi, Jellieszone, National Geographic