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在长江入海口咸淡水交融区分布着多种蟹类,每年初夏(5~6月间)随着潮汛的到来可以发现成群的蟹类幼体,据王云龙等(1997)于1995年和1996年的4~6月,在江苏如东县和东台市沿海所作的沿海蟹类种类组成调查报道,在河蟹苗汛同期出现的蟹苗有天津厚蟹、日本大眼蟹、红螯相手蟹。
A variety of crabs are found in the fresh-water blending area at the mouth of the Yangtze River. In the early summer of each year (May-June), groups of crab-like larvae can be found along with the flood season. According to Wang Yunlong et al. (1997) in 1995 and 1996 From June to June, the investigation of species composition of crabs along the coast of Rudong County and Dongtai City of Jiangsu Province showed that crabs of Tianjin Crab, Japanese big-eyed crab and red-cheeked crab appeared in the same period of flood season in crab and crab.