One of my all-time favorite images, I saw it at least a decade ago when I deliberately scoured the internet for closeups of maggots to finally find out what their heads look like once and for all...it really is almost never shown anywhere.
Cartoons and other artistic depictions always give them completely made-up heads and mouths, often lamprey-like or copied from better known larvae like caterpillars or grubs. The truth really is weirder and cooler than fiction.
I know they have no eyes, but the bulges are sensory, I think touch or smell receptors? Both?
Not only do they have walrusy faces, but they kinda have the same body shape and even walk with the same rippling on land. Walruses were just giant vertebrate sea-maggots all along.