Carnage Symbiote (Marvel Universe)

Carnage is an enhanced version of the Venom symbiote created by The Goblin.

Green Goblin injected a Venom sample into Peter Parker. Due to his powers and smarter intelligence, Peter transforms into Carnage. He was sent to destroy the team and fought and easily defeated White Tiger, Power Man, Iron Fist and Nova at Harry Osborn's apartment. Harry later got Carnage to remove itself from Peter and take him instead, turning him into Venom.Harry Osborn absorbs the Carnage symbiote, freeing Peter while Harry reverts into Venom.

In The Comics
Carnage's host was the serial killer Cleteus Casady, not peter.

Carnage is an alien who is the venom symbiote's offspring.