Awesome. I love the skeletal look of it; from the thumbnail, it looks like the skeleton of a whale. By the look of the design, I'd assume that there was some biological incompatibility between the humans and the aliens—say, different atmosphere requirements, each toxic to the other.
My one complaint is that the background makes it hard to see the labels and the human scale reference figure.I think this would look just as good with a simpler background.
Also: I find it frustrating at times how human spaceships are so often depicted as being blocky or rectangular. Just a random thought.