Needs review
Source: Stormwrack

Description: You can survive out of the water for a longer period of time than most of your kind.

Prerequisites: Needs to breathe water

You can survive out of the water for 3 hours per point of Constitution. After this point you must make a Fortitude saving throw each hour (DC 15, + 1 for each previous check) or you begin to suffocate.

Normal

Aquatic species of various races can survive out of water for 1 hour per point of Constitution; after this point they begin to suffocate.