A three part cage style fish trap. I designed it to fit within the dimensions of my printer and without the need for support material. The trap ends have cone like openings where the fish are able enter but have trouble leaving. The given size is useful for small fish but a scaled up version would probably be needed for crayfish.
Tested with both PETG and Flexible filament. Flexible filament is much more rugged and is not prone to breaking as with other filaments. The trap has not been tested for its ability to catch fish yet but should work nonetheless.
The minnow trap is created by printing two end pieces and as many middle pieces as desired. I used small zip ties to attach the pieces together. The trap can be scaled to fit your needs.