今日涨跌停股分析：33只涨停股、99只跌停股，水产概念活跃，中水渔业6连板，獐子岛3天2板

Group 1 - A-shares experienced significant market activity with 33 stocks hitting the daily limit up and 99 stocks hitting the daily limit down on November 21 [1] - The aquaculture sector showed strong performance, with Zhongshui Fishery achieving six consecutive limit up days and Zangzi Island recording two limit up days in three days [1] - The Google concept stocks also performed well, with Yidian Tianxia and Jiuqi Software reaching the limit up [1] Group 2 - ST Ruihe and Longzhou Shares faced three consecutive limit down days, while ST Yunwang and ST Jianyi experienced two consecutive limit down days [2] - Other companies such as ST Hengjiu and ST Guohua also hit the limit down [2]