Mammals have their airway and digestive tract linked which can lead to suffocation if something goes wrong when swallowing. You’re probably familiar with a whole host of other strange evolutionary artifacts in the eye, prostate, various skeletal structures, and so on. Well, giant squid have their own “WTF?” design. Their esophagus goes through their brain. And it’s a very small tube. If they ingest something too large it’ll get stuck. They will sustain brain damage.
I learned of this via a documentary I saw on TV about the colossal squid they caught intact and is now in a New Zealand museum. I want to say it was on Animal Planet but maybe not. Anyway, they dissected a giant squid for fun and showed how this little tube went through the brain itself. Now* that’s* some intelligent design.