Why do newt SOMETIMES open their mouth?

[carlcaruana]

Hi everybody! I just wanted to know why sometimes my newts open their mouth once. They open it like once a month or something and the behaviours is LIKE when we open our mouths when we get tired. Thx!

 

[Bellabelloo]

I am not sure to be honest, but maybe they are about to shed and are stretching the skin

 

[Azhael]

That´s definitely a possibility, and if you see an animal yawning repeteadly it´s almost a guarantee of an upcoming shed.
They do it occasionally with no relation to shedding and i would just assume that like in many other animals it´s done to relax and "reposition" jaw muscles.