Rathkea octopunctata appeared mainly in the February peak,Phialidium mainly in the June peak,Muggiaea atlantica and Eirene mainly in the October peak.

• 渤海水母类密度的季节变化有3个高峰，出现在冬季，夏季和秋季，分别由八斑芮氏水母、酒杯水母属、和平水母属、五角水母构成。