zhè / tiáo / yú / de / yú qí / fēi cháng / piào liàng / zài / shuǐ zhōng / qīng qīng / bǎi dòng

这条鱼的鱼鳍非常漂亮，在水中轻轻摆动。

The fins of this fish are very beautiful, gently waving in the water.