The Boa-Boa (ボアボア) is a badnik that appears in Sonic Adventure.
It's a worm-like badnik apparently based by the Catakiller, Jr., both in design and purpose. Its a large pink worm that glides in circles through the air, releasing flame jets from their side. The Boa-Boa is composed by segments, and when one is destroyed, the whole badnik is destroyed as well. Gamma will take the most advantage of this badnik, because he can lock on to each segment and still count as different enemies for the time bonus.