渔业板块12月18日涨0.3%，大湖股份领涨，主力资金净流出5066.67万元

Group 1 - The core viewpoint of the news is that the fishery sector experienced a slight increase of 0.3% on December 18, with Dahu Co., Ltd. leading the gains [1] - On the same day, the Shanghai Composite Index closed at 3876.37, up by 0.16%, while the Shenzhen Component Index closed at 13053.98, down by 1.29% [1] - The fishery sector's individual stock performance is detailed in a table, indicating varied movements among different stocks [1] Group 2 - In terms of capital flow, the fishery sector saw a net outflow of 50.67 million yuan from main funds, while retail investors contributed a net inflow of 56.72 million yuan [2] - The table mentioned provides insights into the capital flow for individual stocks within the fishery sector [2]