There are ways you can breathe underwater.

You can:
1. Have a cleric cast the spell (I believe it is called 'underwater breathing'
2. Have a necro lich or ghoul you (so you don't breathe).
3. Be a nereid.

There is an interesting area called the temple of last breath where there is no air. It's empty but fun ;\)
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If you say plz because it is shorter than please, then I will say no because it is shorter then yes.