Rays and skates are members of a superorder of fishes called Batoidia (they're also in the subclass Elasmonbranchii, to which sharks also belong). Batoids are super weird. You should read about them. But for the purposes of this comic, what you need to know is that batoid undersides look like funny little faces.
Fair warning (in case the headline wasn't warning enough): this video serves up a hefty helping of elasmobranch guts. The squeamish among you might want to look the other way.
On second thought, that's not entirely accurate. Comparing a sawfish to a "madman" might give you the impression that these cousins of stingrays are unruly or careless when it comes to dispatching prey with their serrated snouts, when, in actuality, recent evidence suggests the exact opposite to be the case. Truth be…