It's really tough to duplicate the fine details with plaster, even with a 2-part mold, lures that require and injection mold. But good try!
https://www.youtube.com/watch?v=vfsGWBV5eNw

But you have given me an idea......

Other than the legs being attached using a candle flame,



I might be able to use my usual floor tile technique used to pour & cut as I do for my minnow grub: