Would it be that goldenhead goby? LOL....Mine was easy to catch he would eat mysis so he would come to the surface to eat I would have the net propped above the water and dive bomb him into the net.
I read if you take a 2 litre clear pop bottle and rip the labels off clean it up and cut the top off lay it on its side on the bottom with food in it because being see-through the fish will swim in and just put the net over the other end and lift him out give it a shot
HTH
