B.O.S.S. (Blimp Of Super Airships) is a M.O.A.B. class bloon, and is the final boss of Caleb40043's BTD6, appearing on Round 150. It takes 25,000 hits to pop. It appears as a Red Blimp with a Z.O.M.G.s shape, the skull is also vertical and is almost inverted, the eyes are blue, and the skull is black. It moves at half the speed of a Z.O.M.G.. It doesn't have any parents or children. (It's a final boss!) Instead of popping when destroyed, it will stop for about 5 seconds, and the music will stop. After the five seconds, it's eyes will begin to flash black and white, the skull's eyes will also turn off. After another five seconds, explosions appear around it, then finally exploding, turning the screen white.