Aboleth's Lung

Transmutation
Level: Artificer * 2, Cleric */Oracle * 2, Druid * 2, Hunter * 2, Sorcerer */Wizard * 2, Warlock * 2
Components: V, S, M/DF (piece of seaweed)
Casting Time: 1 Standard Action
Range: touch
Target: living creatures touched
Duration: 1 hour/level; see text
Saving Throw: Will negates
Spell Resistance: yes

The targets are able to breathe water, freely. However, they can no longer breathe air. Divide the duration evenly among all the creatures you touch. This spell has no effect on creatures that can already breathe water.