Grotesque sewer monster with gaping toothed maw and tentacles

A gargantuan, slimy maw with thick, rough scales and translucent skin, veined with pulsing red and purple, stares menacingly with horrible, mean eyes. Its wide, toothy mouth gapes, revealing rows of jagged, yellowed teeth. The upper maw features bony plates, while the lower maw extends into gnarled, root-like tentacles, propelling it through a dark, dirty, storm sewer system. Skulls and bones litter the sewer floor. Rendered in a vivid, dynamic fantasy art style with dramatic chiaroscuro lighting, evoking the opulent, grotesque details of H.R. Giger and the vibrant, monstrous creations of Brom.