We went to Victoria Canada for our honeymoon 10 years ago via Seattle. Of the 6 days and nights we spent out there, I had Halibut 4 of the nights for dinner.
I don't anything about sea fishing, but would think the smaller younger fish at 20-50 lbs. would taste better?
i.e. Brooke Trout - 7" to 9" make the best fryers!!!
Apparently they call the less than 50-60lb fish "chickens". They process the fish the day they're caught,cut them into serving portions,vacuum seal them and flash freeze them. Taste great.