you need to use the mask and transform tools to move them apart from each other. Dynamesh aproximates at lower sub d's so anything to close will become fused. I'd recheck the anatomy on those arms. :D
Hey JoltZero! Looks like a fun class assignment :) Did your teacher have you use the nickZ tool for your basemesh? I recognized the feet. If it is the nickZ base hopefully your teacher told you about polygroups because they can be super useful in sculpting. If you hit the polyf button you should see a bunch of different…