An Abomination is the result of an Alien experiment used on an abducted human; found in Fallout 3's Mothership Zeta DLC. They have a mixture of Human and Alien DNA. When they are released from their stasis pods they will attack any Non-Abomination creature they spot, including the Aliens. Just like Feral Ghouls, they will shreik and point when they spot you, this will alert all other Abominations in the area. When you shoot these creatures will will bleed red blood, however if you remove thier limbs they will bleed green blood.