I have never frozen fish. I make sure that when I decide to keep a fish, I make sure it is eaten within 24 hours. Usually I catch at night/early am, right into a cooler with ice, into the refrigerator when I get home, filleted during my lunch hour the next day and on the grill or in the oven at 6pm.
I usually invite someone from my family or friends for dinner that night or I send a dish over to my neighbors as soon as the fish is finished cooking. No leftovers.
I usually only keep one a month, once in a while two.
I don't own a food saver gizmo or maybe I would think differently about fish. We eat fish at least a couple times a week and we always go to the market on the day we are going to eat it to buy it.
Quick story, where my family is from in a fishing village in Sicily, if the fish is not purchased directly off of the boat as soon as it comes in, it is looked down upon as not being fresh. My family gets inside information on when the boats will come in sometimes in the wee hours of the morning and we go to the docks. Many times, I have seen fights break out on the docks because everyone wants the freshest fish possible.
I don't know how both my parents raised and born in a port town in Sicily and my dad had absolutely no interest in fishing.