Xenophage's main diet consists of alien symbiotes, though it will eat other things such as human children when on the brink of starvation. The first Xenophage to appear ate several unnamed symbiotes and their hosts, such as George, left over from the "Planet of the Symbiotes" storyline. Because it would typically eat the brains of its victims, the authorities attributed this spree of killings to Venom, and thus concentrated their efforts in bringing him to justice. In the final confrontation of the Venom: The Hunted miniseries, the Xenophage severely injured Scream and attempted to eat a group of skateboarders, before being slain by Venom when he tricked it into eating a white phosphorus grenade. More of the same species would later appear on Earth attempting to locate their specialized foodstuffs.

Powers and Abilities:
The Xenophage have metamorphic abilities; like the symbiotes, they can change their shape, size, and texture. The Xenophage that stalked Venom was able to convincingly disguise itself as a China cabinet, complete with dishes and glass. Moreover, it was able to hide the entire mass of an incapacitated Scream within its bulk. Besides their huge size and superior strength, Xenophages also have the ability to breathe a certain kind of fiery chemical which causes symbiotes to become paralyzed, as well as "enhancing the flavor".