I have a green Clown gobie that I was going to put in a small tank that has been cycling. I have been keeping him in a floating little lee's fry holder with a lid. Unfortunately, I left the lid off and he inched his way out of it, into my 30 long w/ 50 lbs of live rock. Does anyone have any tricks to catching a tiny little fish like this? he is about the size of my pinky fingernail.