C2468 Catastrophe after Disaster

The appearance of piranhas in Yangtze River, Yellow River, and Liangshan Lake came out one after another from the Changjiang Gang, Yellow River Gang, and Liangshan Lake. Normal players didn't think much of it. When piranhas appeared, they could just kill them. What was there to be surprised about? However, when the various grain merchants, seafood shops, and fishers heard it