Bingo! Very nice.
You've done an especially good job of picking viewpoints that put a lot of the spider near the focal plane. For example in picture #1, you have the cephalothorax, the abdomen, and 3 of 4 foreground legs all pretty close to in-focus, even with a fairly wide aperture that gives great resolution. Given so much fine detail to appreciate, the viewer really doesn't care that the background legs and one of the foreground legs are fuzzy. This is what's called "good control of DOF". The best photographers seem to do this consistently and effortlessly (though I suppose they'd never tell us if they were grunting and puffing on the inside!).
Picture #2 does not look as sharp as #1, but it's at so much higher magnification that the tradeoffs are a lot tougher. The dramatic viewpoint prevents putting more parts in the focal plane, and the live spider prevents stacking.* So you're stuck with the tradeoff between fuzziness caused by diffraction & limited DOF caused by geometric blur when setting aperture. Overall, I'd guess that you got this one close to perfect.
--Rik
[*] If the spider is not live, then stacking lets you get around the DOF/diffraction tradeoff. See, for example,
this old post .