Warning: This is 3.0 Edition material. It is possible that there is more recent 3.5 Edition version.
Inaccurate?

Controlled Respiration

( Savage Species, p. 31)

[General]

You can stay out of water longer than you otherwise could.

Prerequisite

Endurance (PH) , Time limit on how long you can remain out of water,

Benefit

You can control your breathing so as to remain out of water for a longer period of time than you otherwise could. Double the normal time limit after which you must begin making Constitution checks to avoid suffocation. This feat does not allow creatures that cannot normally breathe air, such as fish, to do so.

Comments on this single page only