Hobbling on its many appendages, the Walking Ameeba can move faster than humans and latches onto the legs of creatures where it begins to drink their blood. It injects chemicals while it drinks that cause euphoric hallucinations so it can safely feed without disturbance. If they become full before a fatal amount of blood is removed the victim survives, however, if they are not full by this time their prey will die from the encounter. Infants are identifiable by their size because before their first feeding they are around 15 centimeters in length, and double in size the first few times they feed. As adults, they can grow to the size of a large SUV after.