In the lecture we just posted, Keith Rittmaster mentioned that Sperm Whales are highly asymmetric. Below is just one examples of this dramatic asymmetry, the size difference between the left and right nostrils in the cranium.
A brief example of asymmetry in Sperm Whales
in addition, the posterior sinus appears to be chock-a-block with some huge, braided roundworms of some sort… just look at them crawling out!