Doc Ock, or Doctor Octopus, is a fictional supervillain in the Marvel Comics universe. Created by writer Stan Lee and artist Steve Ditko, he first appeared in The Amazing Spider-Man #3 in 1963. Doc Ock is known for his mechanical tentacle-like arms, which are fused to his body after a lab accident. These arms give him superhuman strength and agility, making him a formidable opponent for Spider-Man. As a brilliant scientist, Doc Ock often uses his intellect to devise complex schemes and confrontations with Spider-Man. His character has appeared in various comic book series, animated shows, and films, becoming one of Spider-Man's most iconic adversaries. Over the years, he has also been portrayed with a mix of villainy and complexity, sometimes even showing moments of redemption.