Ducky Tube Zombie is the first encountered and the 11th zombie encountered. When encountered, it will walk up to the Pool's edge, jump into the pool, and move across the water. During the final waves of the Pool and Fog levels, they will suddenly appear from underwater in groups of two or three, similar to graves in Night levels and the ambush zombies dropped by Bungee Zombies on Roof levels. The Ducky Tube Zombie is actually four separate land zombies adapted for the water: regular zombie, Conehead Zombie, Buckethead Zombie, and Flag Zombie.