Waterspawn

 
Prerequisite(s): Aberration Blood, one other aberrant feat
 
Benefit: You gain a swim speed equal to your land speed. This also grants you a +8 racial bonus to your swim checks, the ability ot take 10 on any swim check, and the ability to use Run while swimming. You gain resistance to Cold 5, you can breathe air and water with equal ease.
 
Source: Lords of Madness