This dual-life form receives enhanced powers and usually refers to itself as 'Venom.' The symbiote was originally introduced as a living alien costume in The Amazing Spider-Man #252 (May 1984), with a full first appearance as Venom in The Amazing Spider-Man #300 (May 1988). The character is a sentient alien symbiote with an amorphous, liquid-like form, who survives by bonding with a host, usually human. Venom is a fictional character appearing in American comic books published by Marvel Comics. Undetectable by Spider-Man's 'Spider-sense'.Symbiote's autonomous defense capabilities.