I'm not sure what other reliable websites there are as far as fishing goes, but I've been using the "Cat became hungry" site for catching the ARR big fish. One comment I see a lot is having too much Gathering/Perception actually puts you out of a bracket and prevents you from catching (or hooking, the comments never specify) these fish.

Given that I'm not an expert on this, just how much truth, if any, is there to this? I'm actually tackling this in Forager's gear + Halcyon Supra right now, just so I don't run into this issue if there is any.