Water

Water is the space on the map where water towers can be placed. In BTD5, the towers that can be placed on water are Tribal Turtles (which can also be placed on land), Monkey Buccaneers, Monkey Subs or Pontoons.

In BTD6, in addition to the BTD5 towers mentioned above (excluding Tribal Turtles since they have not returned), the heroes Admiral Brickell and Pat Fusty can be placed on water.

As of now, all 13 current maps in Bloons TD Battles 2 contain water.