What's the use of fishermen in the mini world?

Fishermen in the mini world will interact with many natural and cultural phenomena at the seaside and survive in the game. According to relevant public information, "Mini World" is a highly free casual 3D sandbox game, operated by Shenzhen Mini Play Technology Co., Ltd. ... This is a domestic sandbox game, where players combine their own buildings by destroying squares and creating squares, and take big risks with friends.