One of my hobbies is aquarium-keeping. I mostly keep and breed guppies and swordtails (the guppies somewhat more successfully than the swords), but I've also gotten into raising inverts. A particular favorite of mine is the dwarf crayfish, Cambarellus patzcuarensis. They have an amusing habit of raising their claws like they want to fight when you stick your hand in the water, but bug out if your hand gets too close and they realize the size differences involved. We named the first one Mister Pinchy. He was awesome. Liked to eat snails and terrorize male guppies.

I did these up to make a big space bug into a big space Mister Pinchy, so he can eat space snails and terrorize space guppies. If you don't want yours to be quite so crustacean-themed, you might want to flatten off the randomly-placed spikes before printing.

As usual, I've included the base files and the supported files. If you want to reposition the arms and claws, it should only be a matter of separating the shells and rearranging them as you want. On my Ender 3, they printed off pretty well at .08, but you might be able to get away with higher depending on how much you tolerate layer lines.