You can survive out of the water for a longer period of time than most of your kind.
Prerequisite: Aquatic elf.
Benefit: 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 elves can survive out of water for 1 hour per point of Constitution; after this point they begin to suffocate.
Source: Stormwrack, page 92.