The Yellow Sea (YS) and the East China Sea (ECS) are typical mid-latitude marginal seas of the northwest Pacific Ocean, and contain the highly productive shelf ecosystems. It's important to learn their zooplankton species distributions and community structures in these areas. In autumn 2000 and spring 2001, two cruises were carried out by R/V “Beidou” and covered extensively most of the continental shelf area of YS and ECS. Zooplankton samples were collected by means of an 80 cm diameter plankton net with m...