1. 双尾纽鳃樽东方亚种等7个种是东海的常见种，羽环纽鳃樽等6个种是次常见种，其余则是稀有种。
Species numbers in spring was related to both the surface water temperature and bottom salinity, whereas water temperature and salinity at the depth of 10 m had a bearing on species numbers in summer.