My mind keeps connecting the orangish cast in front of the chassis with the darker area behind it. Can't come up with a theory on what that connection might be, though.
On the other hand, maybe they felt this overwhelming urge to voluntarily release a photo with something they wanted to hide in the frame. Cropping the photo or taking one from another angle might arouse suspicion, so they altered it. Craftily, they did this in a way that's immediately obvious from a glance at a low-res copy. After all, no one would believe that an organization capable of locating and exploring a wreck on the ocean floor while engaging in a sophisticated deception scheme would be so clumsy about altering a photo.
