Midjourney creations – humanoid alien

My wife is writing a story about humanoid aliens that have black & white striped skin, but she was having trouble generating something that didn’t look like a zebra. So, I tried and came up with this. I think it’s a greyscale image though I didn’t ask for that, nor have I looked at a Photoshop histogram to verify.

The exoskeleton-like ridges are pretty cool. Maybe these creatures are like our spiders who have both exo- and endoskeletons.

Then asked Midjourney to zoom out. They look a bit too humanoid for me, but they would be right at home in a Star Wars cantina or Star Trek cafeteria.