The glistening bodies of Nomura's jellyfish tumble out of a fisher's net in northern Japan in September 2003.
Each adult jelly can weigh up to 440 pounds (200 kilograms). Their bodies can clog or even rip through nets during an outbreak.
In 2005 and 2006 fishers off Japan's western coast unintentionally snared so many giant jellyfish that the workers tried to make up for lost income by selling their unwanted catch as crab food, fertilizer, and even dried and salted novelty snacks.
Photograph courtesy Awashimaura Fisheries Association Coop via Reuters