Aquatic Butcher, known as Killclaw in first two installment, is a stronger, FOE version of the Cutcrab. Those opportunistic hunters often lie underwater, just out of sight, and are drawn to nearby random battles. They will approach battles-in-progress until they join the fight, at which point they attack. They appear in Etrian Odyssey, Etrian Odyssey Untold: The Millennium Girl, and Etrian Odyssey II: Heroes of Lagaard.