June+10/October in 5438, Dalian sea cucumber could not be caught. Deep-sea sea cucumbers are basically divided into three seasons a year. They are dried from March to the end of December and early January in spring. From 1 month to March, divers can't fish underwater for a long time because the water temperature is too low. In summer, mid-late July to September is the breeding period and summer dormancy period of deep-sea sea cucumbers. Due to occasional fishing, the yield is small.