东沙是江苏省辐射沙洲中最大的一个沙洲,位于121°01′21″E～121°17′39″E,32°53′N～33°18′N,与大丰东台市海岸相对,距陆岸最近距离20公里。沙洲零米以上面积104万亩(其中0米～3米低潮区72万亩,3米～5米中潮区31万亩,5米以上高潮区1万亩)。东沙滩面平缓、底质含沙量高、滩面潮流畅通、海水盐度适中、营养盐丰富、藻类生物品种多,构成了丰富的海洋生物链,是贝类繁衍、栖息的理想场 Dongsha is the largest sand bar in the radiation sand bar in Jiangsu Province, located at 121 ° 01’21 “E ~ 121 ° 17’39” E, 32 ° 53’N ~ 33 ° 18’N, opposite to the coast of Dafeng, Dongtai City. Landshore nearest distance of 20 km. The area above zero meters in the Shazhou is 1.04 million mu (of which 72 million mu are in the low tide range of 0-3 meters, 310,000 mu are in the tidal range of 3-5 meters, and 10,000 are in the climax area of ​​5 meters or more). The smooth surface of the east beach, high sediment concentration, smooth beach flow, moderate salinity of seawater, abundant nutrients and algae species make up a rich marine biological chain, which is the ideal field for shellfish breeding and habitat