I'm wondering if, anyone else is having the same problem as I.
I recently hit R18 on fishing and received Gulleye III.
Being that I was already in the Horizon area, I decided to give it a go, to see what I could find.
I must have run all over the area twice, and not once was I able to find a Grade 3 school.
I checked on a few sites including disciplesoftheland but unfortunately they didn't seem to have any schools listed.

Does anyone know where Grade 3 schools can be found?