I really doubt it would work because the bug would simply keep flipping backwards
That's precisely why it works
The best bug catching device is a bichero (cuban name) which is simply any thin, stiff pole with a largish fish hook fastened to the end. You get it under the lobster, and jerk it back and up into the base of the tail. The lobsters backward motion only serves to secure it on the hook. I think someone posted a video here of catching lobster this way. The resulting hole is so small that it's easy to miss. I heard our own FWC use some sort of light which marks the lobsters body fluids where they would issue out of the hole. I imagine a good clandestine bichero would be a threaded speargun shaft, and a hook point which could be quickly removed and replaced with a speargun point.
