Yes, the threads - ha ha couldn't think of that word!
I will take a pic tomorrow if you like though it's not much to look at!
Hey it works, although I have discovered that the fish do LEARN once they have been caught in it once (or twice). I am trying to catch that Dottyback and the little bugger is staying clear! But I figure if I leave the bottle in there long enough, he will get used to it and go in again! Started to get used to it abit more even tonight after been in there all weekend.
I googled it and found you a link with a pic.
http://ca.wrs.yahoo.com/_ylt=A0oGkun.../fish_trap.php
Only difference is I found the mirror was the only thing that worked for the sixline (along with bait). Tried for 5 days though so you must know it it won't likely be immediate.
Good luck!
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45 Gallon Cube with 10 Gallon Sump, Lighting 8 bulb T5, Vertex IN 80 Skimmer
-2 Occelaris Clowns, Engineer Goby, RBTA, Peppermint Shrimp