Whenever I've had to catch a fish for whatever reason, I get my girlfriend to help me, we usually dont have much trouble. We each have a net, and we corner the fish...if he swims away from my net he will swim towards hers...then he will turn back to me...then her, etc, etc...eventually you should have him cornered to the point where he cant get away...it might take a couple of tries but it always works for me. Worked for catching a sebae clown and a sixline wrasse.