The dnd5e spell grants almost 10 creatures the ability to see within a certain range and breathe underwater. All affected creatures will retain their normal modes of respiration.

Water Breathing 5E Spell: Attributes

Casting Time 1 action
Classes Druid, Ranger, Sorcerer, Wizard
Components V S M
Durability 24 hours
Niveau 3
Material A piece of straw or a short reed
Name Water Breathing
The Range 30 feet
Ritual Yes
School Transmutation
Target Within range, you can see up to ten friendly creatures