Pivot Door Fish Trap
This fish trap uses a door that can pivot right or left to catch a fish. The trap itself needs to be secured to wall of your tank with a couple of large cleaning magnets because it weighs about 5.5 lbs. The handle is to manually close it while you are by your tank baiting the fish to enter, but you can also affix some fishing line and rig it to be able to tug the door shut from a distance.
Box area is 12 long x 8" wide x 12" tall, plus the handle that adds another 2" to the height.
You can see a brief video posted to my facebook business page here: