Most of us return all the fish we catch unless we decide to keep the odd one for the table. Personally, I return everything.
So what is the best way to land a fish with the fish´s welfare in mind? I think that the answer to the question, like the answer to many questions is ……it depends!
The usual way is to land the fish in a landing net. These things are now made with very fine knot-less mesh which is less likely to catch in fins and spines. Landing nets come in all shapes and sizes. Carp nets can be huge and swallow up really big fish comfortably, whereas smaller scoop nets, like the lovely wooden framed model Mark McCann owns, are pretty to look at and easy to carry around. I think nets of this kind are more popular in the States among trout fishermen. There is a trade off between ease of carrying around (short handled nets) and ease of landing fish (bigger long handled nets). I guess everyone makes their own mind up here. My own net is something of a compromise having a double extendable handle and the net itself has a joint allowing it to fold back over the handle.
Black bass have huge mouths and, when they are landed, obligingly open them up making it a simple matter to hold the fish by the lower jaw and gently pick it from the water. The fish can usually be unhooked and returned without being handled anywhere but its lower jaw.
And pike too, even big ones, can be picked up by hand by gripping carefully on the underside of the head between the gills although it is a good idea to make sure you see how this is done first! Pike are scary and have a lot of teeth! This approach to landing pike particularly lends itself to fly fishing because a single hook is used and there won´t be extra treble hooks flying around. Many float tubers routinely land their fish this way.
Out on the river I rarely carry a net. The fish I catch are always beached. This is possible because of the suitable shallow banks and the soft muddy substrate. I think that from the point of view of fish welfare this is the best way to go for a couple of reasons.
First, the fish can be landed sooner than if you had chosen to use a net. It is not necessary to be so close to the fish as when netting them and the fish´s own movements can be used to beach it. The fish needs to come close to a fisherman to be netted, particularly if the net has a short handle. As a result it may need to be more “played out” and quite a lot of strain is put on the tackle. The sight of the fisherman is often enough to give the fish a new lease of life and off it goes again!
The second reason I prefer beaching is that the fish has less contact with the fisherman. Less of the fishes surface comes into contact with hands or mesh. With care, it is possible to unhook and photograph a fish lying in the shallows without handling it very much at all. Finally, with wet hands it is simply helped into water deep enough to support it and off it goes!
Trout can be landed by hand or by net and the decision is made by the angler depending on the particular circumstances. They say that a trout, if turned upside down, will lie calmly in the angler hands. I am too nervous to find this out for myself! Other things being equal, I think I would opt for a net. I catch so few decent trout these days that I don´t want to take any risks!