Ok, ready?
Here's the trap!
First is just a picture of how I keep it when its not in use...
Now a picture of the "parts" pulled out for a better veiw...
Now two pictures of how it would work (ignore the altoids tin I had to prop the door up and it was close at hand) and the door does slide all the way up the when your using it so they don't actully have to swim under that door...
And a different angle...
Now two pics of "proof" it works...
Blue Green Chromis
"Mow" the Lawnmower
"The trap" is 1/4" Acrylic on the top and bottom, 1/8" Acrylic on the sides and back, the "guillitine" door is 1/8" glass. The trap measures 8" long 6" high 5" deep. I had to make the door out of glass for it to drop fast enough, Acrylic was too light. The only hole other than the door is where the tubing goes into the top, this tubing is conected to a syringe that is used to inject food. The line attached to the door ( I used like 40# fishing line) is pulled up and over the rim of the tank and taped to something near by, when the fish swims in for food you strip the tape and bam, down comes the door.... the only downside to this trap is you have to be watching to trap the fish, I have had to leave it in the tank for two days to catch a wrasse, I just didn't feed out of anything other than that tube into the box and eventually it was "normal" for him to go there to get food....
Any questions are welcome. ... I almost wish I wrote this up on its own thread lol