Cutting embedded images instead of cropping

I have a bunch of embedded images and I'm trying to cut them apart. So far, the best way I've been able to do this is to copy and paste and then crop them individually.  There must be a way to cut the images apart and just separate out what I want rather than doing it this way.  I've included this image to explain it better.  I want to cut out the individual poses from the images on the right, so that they become like the individual poses on the left.