I had been studying whale anatomy for a little while previous to this and it was immediately apparent to me that they had erroneously displayed the pelvic bones. What made it all worse was the sign in front of the skeleton that talked about the whale's evolution from 4 legged land mammals - calling attention to the "obvious" hind limbs in the skeleton in front of the viewer. (I wish I had taken a picture of the sign.)


In reality the pelvis of a whale is situated parallel to the spine. Here they dangle the pelvic bones perpendicular to the spine, making them look like little legs. Furthermore, they dangle the little "femur" bone at the end of the pelvis, adding further to the limb image.
In reality, the little bone that is attached to the pelvis of certain cetacean species is attached near the center of the pelvic bone - not via an acetabular cavity as in a typical femur/pelvic connection.
Here is how the little bone is arranged in a humback whale:

I can't imagine how the curators or construction crew of this skeleton botched these details - especially when the sign makes such a point of drawing attention to them in order to "prove" to little children that whales evolved from land mammals.
I contacted the museum. I was told that the skeleton had been hanging up for a long time, and had been put together by folks from the National Oceanic and Atmospheric Administration, and that they would "consult with colleagues to see what can be done."
It has been several months since my visit, so I'm not sure if anything has changed.