We need more ways to make gold in this game.

[Hanabira]

You clearly never played FFXI very much...

There were all kinds of ways to generate* gil, fishing was certainly one of many good methods. You could fish up to 200 per day, and sell stuff like black sole or breams for about 180k per day to NPC.

You're forgetting about hakuryu. if you manage to catch 200 of them in a day, you NPC them for a bit over 2mil a day. realistically youd really get about 1.2mil a day. and then there were at least 20 people at all times fishing for them.