It's really hard recreating an alien species purely from the mind, but this is one representative of a caynar I have in my story.

This took over a day. First I started with txt2img with several generations until I found something "close enough". At that point, I took the seed, and began the fine tuning, adjusting the features in tiny steps with batches of 4. When I got to "good enough", moved it over to inpaint to begin changing small details. Gone through many many generations with that until I got what I wanted, then shifted it over to img2img to help flesh out the final details at 0.3 denoising. Basically smoothing out the inpainting parts.