Symbiote

[Renato]

The snake-like [Goauld] parasites that forcibly take human hosts, and possess a thirst for power and worship. They have enslaved countless worlds, using their inhabitants as hosts, soldiers, miners, and personal slaves.

[Rihanna]

Roomate

[Dave Paprocki]

A black alien [parasite] seen in [the Spider-Man] comics and that is most popularly known as [Venom].