PHB
Water Breathing
3-level Transmutation
Ritual - does not require spell slot, takes 10 minutes longer
Casting Time: 1 action
Range/Area: 30 feet
Components: V, S, M
Materials: a short reed or piece of straw
Duration: 24 hours
This spell grants up to ten willing creatures you can see within range the ability to breathe underwater until the spell ends. Affected creatures also retain their normal mode of respiration.