More than 300 fishing boats set off towards the fishing grounds. [Photo/provided to chinadaily.com.cn]

Fishermen at the Haiyang Island of Changhai County held a ceremony to celebrate the end of the longest closed fishing season in the Bohai Sea and the Yellow Sea on Friday.

This year's fishing moratorium was from May 1 to September 1, being extended a full month than the previous years.

Located in the depths of the Yellow Sea, the island is about 140 kilometers to the northeast of downtown Dalian, Northeast China's Liaoning province.

The Haiyangdao Fishery is one of China's four major fishing grounds, with rich marine resources and precious seafood, including trepang (a kind of precious sea cucumber), abalone and sea urchin.