1: [Young]
A Maw pup has no eyes of which to speak, but it can still see! By sampling the air with its tongue and projecting the olfactory information via taste receptors onto the roof of its mouth, it creates an image in its brain that allows it to 'see' - and in every shade of pink imaginable! Explains the Maw pup's perpetually rosy disposition, despite inadvertently catching flies in its gaping yap from time to time. What would happen if this fleecy little fur ball were to close its mouth? We'll probably never, ever know.
2: [Adult]
First, can we just say it's a good thing the Maw has only it's lower-or "mandibular" teeth, lest it bite its own tongue off? Alas, Maw is a bit of a blabbermouth. To be fair, it couldn't hold its tongue even if it wanted to, owing to the fact it doesn't have hands. So, does it ever close its mouth? Judging from the eye rolls of its monster pals, the answer is decidedly 'no'. Maw's favorite pizza toppings include pickled turnip and jellied beets.
3: [Prismatic]
This Maw returned from the Prism Gate forever changed! Capitalizing on its penchant for 'mouthing off'. Its alteration at the molecular level has replaced its sensory fur with a living, motley jester's costume - extraordinary!