For certain fisheries the popularity of a device called "boga grip" is increasing. This is particularly true for saltwater fisheries because of the sharpness of the teeth of gamefish in the sea but I am sure they are used in freshwater as well. The device is a metallic gripper for the fish's lip. I have not heard of or read of any documented negative effect from this device but don't use them because it puts all of the stress on a small point on the fish's lip while lifting and allows the fish to thrash about on that tiny area while held out of the water.
This is just my opinion - but I don't use them and won't use them. What is your opinion on them? Ever try one?