A deep diving lure modelled on a squid.

The hollow chambers on the lower side are for ball bearings. I'd recommend 5-7 BBs in the rear chamber and 3-4 in the fore chamber.

Print in 2 halves at 0.2 resolution, put a through wire and BBs in and glue together. Paint, slap on eyes (I like the googly ones), clear coat (if you can), and slip on a skirt (on the lure, in case that wasn't clear).

If printed at this scale, #4 hooks will suffice.