Can one go fishing during Ramadhan to put food on table or to sell?

Praise be to Allah, the Lord of the World; and blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
There is no harm in doing all that. In fact, the fasting person can do all kinds of jobs provided he avoids anything that could break his fast. He can work in trade, in fishing, … etc.
Allah knows best.