○○○ gulp ⪢⪢
But if that doesn't work, like if there is not enough oxygen in the water, the axolotl has a backup, fully functional
lungs. It can use to gulp air from the surface. These organs are evolutionary leftovers from when its ancestors lived on land.
http://qindex.info/i.php?x=16131
◎◎◎ fill ⪢⪢
