Swamp

 is one of the 17 tracks in Bloons TD Battles and Bloons TD Battles iOS. It was added in an update of the game, coming at 22nd December 2013 (check date?).

Overview
The spiral like feature makes it great for tack shooters and ice towers. Also 3-1-cannons are effective.

Place Ninja Monkeys near the exit and not in the center. Otherwise new bloons will block them fighting against outside bloons.