Large numbers of jellyfish have been swarming near nine thermal power plants on Ise Bay. Chubu Electric Power Co. estimates that there are close to 24,000 tons of the sea creatures swimming around the area, twice the usual level and the second-most recorded in the past decade.
Measures are being taken to ensure the jellyfish don't clog the power plants' water intakes and disrupt their operations.
Chubu Electric launched a research project in 1999 to predict the number of jellyfish in Ise Bay. They discovered that most jellyfish larvae transform into polyps in three major areas: near the port of Nagoya; along the coast of the Chita Peninsula from Tokoname to Morozaki, Minamichita, in Aichi Prefecture; and along the coast of the Shima Peninsula from Matsusaka to Toba in Mie Prefecture.