Pick of the Luminary/A Miner's life for me

[Haru]

You only have to be at the right grade in the right region. You can do the [whatever grade] in town if you want. You do not have to do schools of fish.

Please note though, that the achievement will not notify you that you're finished until you put your rod away.

It does say you need schools of fish. So I would be inclined to think otherwise