removing fish

Any advice on handling med to large rays? I have a male that I am going to need to remove from a 240g tank. His disc is just over 15” so not particularly large but I haven’t had a lot of luck with nets and this ray in the past - he usually gets his Barb stuck in a net and it is very difficult...

I have 3 bluegill sunfish in a planted 55 gallon aquarium. I have tried for hours to get them with a net but they are too quick! I want to give them to my friend but I can't get them out of the tank.