It can get tough to net a fish "head first" into the net when the fish is in current. Everything DriferWa says is correct. One very important thing to know is that if the fish is going to be released and you have to net it, make sure you have a soft mesh, catch and release style net. The problem with the one I have is that the net is sooooo long that when the netter doesn't hold the bottom of the net it drags in the current and races past the fish and "of course" as it passes one part of the net gets to the hooks; then you have got a major f-up; fish outside the net and hooks in the net. Try to avoid that. Get a soft meshed net, hold the bottom until you can get a good "head shot" and if the fish is wild then release it. The typical store bought salmon/steelhead nets will score the beejeppers out of sides and fin rays of fish that are not intended to be bonked which will cause increased mortality.

Beezer