Nomura 's jellyfish seen in Sea of Japan for third year since 2007 . Species can grow 6 feet ( 1.83 meters ) in length , 450 pounds ( 204 kilos ) caught in expensive nets can threaten communities .
Nomura 's jellyfish seen in Sea of Japan for third year since 2005 . Species can grow 6 feet ( 1.83 meters ) in diameter , 450 pounds ( 204 kilos ) Tears in expensive nets can devastate communities .