渔业板块8月18日涨0.87%，国联水产领涨，主力资金净流出2405.28万元

Group 1 - The fishing sector increased by 0.87% on August 18, with Guolian Aquatic leading the gains [1] - The Shanghai Composite Index closed at 3728.03, up 0.85%, while the Shenzhen Component Index closed at 11835.57, up 1.73% [1] - The trading volume and turnover for key stocks in the fishing sector are detailed in the provided table, with Guolian Aquatic closing at 4.18, up 2.45% [1] Group 2 - The net outflow of main funds in the fishing sector was 24.05 million yuan, while retail investors saw a net inflow of 36.77 million yuan [1] - The detailed fund flow for individual stocks shows that Guolian Aquatic had a main fund outflow of 4.98% and a retail inflow of 6.15% [2] - Other stocks like Dahu Co. and Zangzi Island also experienced varying levels of fund inflow and outflow, with Dahu Co. seeing a main fund outflow of 2.33% [2]