Scuttle Crabs are neutral monsters that spawn in the river, one in the top half and one in the bottom half. They are non-aggressive and run away when attacked. Killing a Scuttle Crab creates a temporary 'Speed Shrine' in the river, providing vision and a movement speed boost to allied champions passing through it. Securing Scuttle Crabs is important for early game vision and river control, especially for junglers looking to gank or contest objectives like Dragon. They are often contested by both junglers and sometimes even laners.