Fins on head? ribs? nose holes? only one dorsal fin on one side? A pelvis? a neck and shoulders?
Nothing in here makes evolutionary sense. Even for an alien evolutionary theory. This looks like the work of human imagination (we are not that good at imagining really original monsters, most of the time we cut and paste pieces of living creatures).
Why do most pics of aliens have 2 eyes, hands, etc? There is no reason to believe that an intelligent enough lifeform evolved anywhere outside earth will come to those solutions.
I think this is a fake.