Air is a feature in Mope.io, similar to "oxygen" in other IOgames. If you dive or dig, your air will slowly decrease. Certain animals can hold the air much longer than other animals, such as the Crocodile. When the Air bar reaches 1/4 of its maximum air quantity it will, like all other Bars, make a red flash saying: LOW Air. You can regain air by going into Whirlpools or Hiding Holes], or (if you are digging or diving) resurfacing. If air is not regained the animal will automatically resurface. The animal capable of holding its breath the longest is The Kraken, with 1.25 minutes.