You can see the black background version on Artstation:
Love the details on the face and with the eyes especially. I have got to put this out and say I am so jealous of your work and it is very inspirational. I would love become as talented and detailed as you. Do you mind if I ask how you normal create your art? Like step by step process?
In regards to Fred’s rex here the morphology of the animal seems spot on , it has a good amount of flesh across the body , proper keratin/rushes on the head and lips. All in all a very well done reconstruction.