Doctor Octopus

Otto Octavius, the four-armed scientist who founded the Sinister Six.

Doctor Octopus (Dr. Otto Octavius), or Doc Ock, is a Marvel Comics supervillain created by Stan Lee and Steve Ditko, first appearing in The Amazing Spider-Man #3 (July 1963). A brilliant, short-sighted scientist, he turned to crime after a laboratory accident fused his harness of four mechanical, tentacle-like arms to his body.

Quick Facts

Species: Human mutate/cyborg
Publisher: Marvel Comics
Creators: Stan Lee; Steve Ditko
Full name: Otto Gunther Octavius

Facts from the source article.

Background

He is counted with the Green Goblin and Venom as one of Spider-Man's three archenemies, and he founded and leads the Sinister Six, the first supervillain team to fight Spider-Man. In the 2012 story "Dying Wish" the dying Octavius swaps bodies with Spider-Man and sets out to prove he can do the job better, as the Superior Spider-Man.