Facehugger (Fictional Creature)

Found in Ovomorph eggs, often in dark, humid environments or derelict spaceships

Does not eat; survives on internal energy until it finds a host for parasitism

Ambushes hosts by jumping and wrapping its tail around the neck to implant a larva (Chestburster)

Extremely dangerous; lethal to the host and possesses highly corrosive acidic blood