I don't know your tank but here is how I got my 6 line out.
My tank is 6 feet long and packed full of rock and coral, I was NEVER going to catch this guy with traps or nets so I started a mini tear down. I took everything out of 1/3 of my tank, the coral and rock and left it empty. I then made a cheap plastic divider that was the dimentions of the width and hight of my tank that I could slide in to divide the tank. I put it half way in so there was still a large opening under it. I then chased the wrasse to the empty side of the tank but instead of catching it I slid the divider down and trapped him on the empty side of the tank. I could then easily scoop him out as there were no obstructions.
Then put the side of the tank back together. It was a pain but better than a full tear down. Some fish are just uncatchable.
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