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.
photo by Andrew David Thaler
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!