Just a note on the c&r aspect, I’d suggest everyone gets a measuring tape, one of the ones you roll up. If you have a good catch and release net, there nothing wrong with leaving the bag in the water and leaning over to measure it in the net. From there you can make your decision without doing much damage to the fish. If you can get a good eyeball for what 80cm is then you should be fine. Another trick would be to take your gaff and mark 80cm on that. Lay it down next to the fish in the water and you can get a pretty decent estimate on how close to 80 it is without bagging or touching the fish. If it’s a hog just let it go, gaff release by the side of the boat.