I found out there's a spell that let's you breath underwater, and i was confused because everytime i got underwater i was fine, no meters or bars indicating my oxygen level. So i guessed it was just a bad game development, being able to go underwater without troubles. Then i found out that if you stay for too long your energy bar starts decreasing. So my question is, is there an oxygen bar and for some reason i can't see it, or this is the way the game was made and i have to wait for a mod?