I enjoy fishing for halibut too. Did you know they shrink? I've found that if I get a 22" leagal halibut, it's time to go home. Lol Or I'll release it, depending on condition or location caught.
I've had a 22" halibut shrink by a quarter of an inch by the time I got it home.
I've had a 29" halibut shrink a whole inch. I caught it and told the game warden, waiting near the shore section of pier, "Yea, it's 29." We measure it and it's only 28". I reply, "Well, it was 29".." lol It took only the half an hour to get up and leave from when I caught the fish, and it shrunk.