one thing I have done in the past with moderate success is to put the net in the tank and leave it for a day or two until the fish just accept it as décor. If it works, then they don't immediately run for cover when you try to net them.
I have had about 40% success with doing this.
I frequent most often usually just use the clear holding containers and herd the targeted fish into it. There is one guy there who can get just about any fish that way, it's friggin uncanny how the fish will just willingly swim into the container for this guy.
But maneuvering one of those in a display tank would be tough.
what is needed is a clear net. I wonder if monofilament could be used, but I imagine a net of it would just look white overall.