Type: Heritage
Source: Planar Handbook
You are descended from creatures native to the Element Plane of Water. You share some of your ancestors' natural aquatic talents.
Benefit: You gain a swim speed of 20 feet, or your existing swim speed increases by 20 feet.
Also, you gain a +4 bonus on Constitution checks made hold your breath. A creature with a swim speed also gains +8 racial bonus on Swim checks made to perform some special action or avoid a hazard, and can take to on Swim check even if distracted or endangered. It can use the run action while swimming, provided it swims in a straight line.