The "Hospital Monster", as shown in Stranger Things Season 3 Episode 5, entitled "The Flayed", has two spider-like arms and one larger ape-like arm. : r/BigArmSmallArm
LEGO Hospital Upside Down Monster Scene (Nancy & Jonathan) From STRANGER THINGS! // Custom LEGO MOC - YouTube
767 – Stranger Things monster giveaway! | 1000 Drawings by Cat Byrne
The scariest monster in Stranger Things 3 was almost too gross for Netflix
Stranger Things Season 3 : Melting & Tom/Bruce Monster - VFX Breakdown by Rodeo FX - YouTube
Stranger Things 3: The 11 best things about the new season | SYFY WIRE
All of the Stranger Things Monsters
Stranger Things 3 : Melting Characters by RodeoFx
Stranger Things: 7 The Scariest Monsters - AniAsia
All the Monsters in "Stranger Things" - The Mind Flayer, Demogorgon, and More