Calanus sinicus is a widely distributed planktonic copepod in the wide ranging temperature and salinity marginal seas of the western North Pacific from Japan to Vietnam. It dominates the mesozooplankton in the East China Sea and constitutes important food for the commercially most important fish stocks (e.g. sardine, anchovy etc.) especially for their larvae. This copepod can be found throughout the year in the East China Sea but shows strong seasonal variation, with the year's maximum in early summer. ...