This interview from The Phoenix is full of nuggets like this one about sharks’ eyes:

A marine educator in Hawaii e-mailed me this question about shark eyes. What she says is that no one seems to know what color eyes the great white has. She’s wondering if anyone’s figured that out.
If you ask Quint from Jaws, he calls ’em [doing an impression of the Robert Shaw character’s grizzled voice] “doll’s eyes — lookin’ at you with those doll’s eyes.” You gotta love that soliloquy. And he calls them doll’s eyes because they look lifeless. And they look lifeless because there’s no twinkle in them, and there’s no coloration in them. You’re basically looking through the [great white] shark’s pupil into the darkness of the back of its eye.