暗纹东方为我国长江特有鱼类,属科,东方属。主要分布于我国渤海、东海、黄海及通海的江河下游,为近海及河川底层鱼类。每年3～5月,性成熟的河集群溯河至长江中下游产卵繁殖,幼鱼在江河或通江的湖泊中育肥,至第二年春返回海里并在海里长至性成熟,再溯河至淡水中产卵。为江海洄游 Obsidian Orient China’s Yangtze River endemic fish, genus, oriental genus. Mainly distributed in China’s Bohai Sea, the East China Sea, the Yellow Sea and the lower reaches of the Yangtze River, near the bottom of the sea and river fish. From March to May of each year, the sexually mature river cluster traverses the river to the middle and lower reaches of the Yangtze River to spawn. The larvae fertilize in the rivers of the rivers or the Tongjiang River, return to the sea in the second spring and grow up to sexual maturity in the sea, To freshwater spawning. For the migratory Jianghai