A huge brutish gorilla. He looks like a jail guard.
One of two of the guards in the Marim prison on the Ape Atoll. If he sees a player outside of their Jail Cell (or close to the wall inside the cell) as a human, he will knock the player back, causing them damage near 100 and then send them back into the jail cell.
It is best to time your escape if you plan to get around him.