It just so happened that all of those tentacles were in my plane of focus.
I'll try my hand at manually photostacking with photoshop. I'm sure it's tedious, but at least I control the stacking. I'll post it here if I ever get a decent finished product.
I did a manual panorama stitching the other day in photoshop http://farm4.static.flickr.com/3582/...ef093b11_b.jpg
I was very pleased with the results.