APE-610, also know as Flesh That Hates. Due to the vast area of 'infection' APE-610 covers, containment is impossible. Isolation of the area has proved far more effective and permission has been granted by the Foundation government to establish a perimeter to keep people out of these areas under the guise of military operations. 

APE-3199, known by the name Humans, Refuted, are a hostile species in the APE FOUNDATION series. They are a species of creatures possessing both chicken and primate characteristics, attack anyone who comes across them and are capable of reproducing at an alarming state only by themselves.  

APE-106, known to the APE Foundation as "The Old Man", is a humanoid entity that secretes an extremely corrosive material and has the habit of Biting and ripping his victims limbs for fun,

APE-XXXX, also known by the name ECHOED PAIR, looks to seem that his lower jaw has a force bite of a shark but with a bigger bite force, they are also a species that look to have a muted ape with a shark, and were born muted together with a genetic material to each other, and if you go in reach him and his twin will come and get you with a massive speed, BE WARE IF YOU GET CLOSE