I have been trying my best to farm the Usuginu Octopus required for Tako-Yaki. After spending 6 straight hours on the shores of the Isle of Bekku I have 4 fish total. I expect this low rate for Big Fish but not for a staple fish necessary for crafting. I'm not expecting it to be easy but I think a couple small changes would make it more reasonable.

When using the expensive yellow-script bait Blue Bobbit remove the chance (or greatly reduce) for it to hook Grinning Anchovy and Hellyfish. Keep it the same for Live Shrimp.

This will greatly increase the opportunities to Mooch if I can catch Ruby Shrimp more often and have a chance at the Octopus. It's already frustrating enough that I'll go 20-30 minutes not seeing a HQ Ruby Shrimp even with Patience II but then when I do mooch I get Glass Tuna. If you would reduce Glass Tuna's chance too I would be even more happy.

In my opinion any fish that is used for culinarian should be able to be caught at least 1 per 20 minutes.