Speaking of fish bait, I do not remember who, but a well know Lepidopterists had a glass gallon Jar with rotting fish while flying to Ecuador on a collecting trip. The rotting fish had a take your breath away kind of smell. He carried the jar onto the airplane (pre- 911) and held it on his lap. During the flight he feel asleep. The jar with the dead fish rolled off his lap, hit the floor and broke. I bet he was the most popular guys on the flight.
I've heard this story from participants on that trip. I heard that the smell carried onward to most of the trip, especially in the shared hotel rooms. It only takes a day to make most baits, and I've never understood why people risk taking bait on flights. It's just too much potential problems for me re/ customs - can you imagine what would happen if this got opened when entering the country? Bad, bad bad.
I knew a certain VP of Manufacturing with ISEC. He was waiting at the airport to pass through the scanners when he broke wind. It was bad, take your breath away bad kind of bad. After passing through security the airline decided not to let him board the plane.
Now I must admit, if that would have been me, they would be evacuating the airport.
The use of decaying/rotting fish as a Bait requires a strong stomach. I have used fish baits with very limited success. Now if you collect Diptera, you will exceed your wildest expectations. However, even if you trap a few lepidoptrans to a fish bait , they will have most of the scales on their wings removed by the continual movement of the flies in the attempt to escape the trap.
How about rotting shrimp paste mixed with egg and a bit of water and left to ferment on the tropical sun for couple of days. The smell is so incredibly intense that even flies don’t want to come to it. surprisingly some interesting species of butterflies were lured. I did not use it in the bait traps but just carefully placed on the ground avoiding any spillage or contact with clothing or skin.