dividing up a fishing catch
Refers to the practice of splitting the day's haul among the fishermen or crew, often according to a set share system.
After fishing, they divided the catch on the beach.
Compound of 網 (ami, 'net') and 代 (shiro, 'substitute, price, share'). The exact historical derivation is uncertain, but the term likely refers to the share of the catch allocated per net or per fisherman.