Bosses

Boss bloons are uniquely-shaped bloons which look like the MOAB-class bloons. They are not considered MOAB-class bloons because anti-MOAB properties won't fall under the bosses. Cripple MOAB doesn't stun bosses, dark knight blades doesn't deal extra damage to bosses for example. However, the assassin sniper is the only exception.

All the bosses also have unique attacks and abilities.

Bosses
Bloonarius

Vortex

Dreadbloon

Blastopopulous