From Races of Faerun pages 60-63
Half-Aquatic Elves have all the half-elven traits listed in the Players Handbook except for the following:
- Swim speed 15ft. Aquatic Half-Elves gain a +8 racial bonus on swim checks and can always take 10 on a swim check even if rushed or threatened. They may also use the run action while swimming as long as they swim in a straight line.
- Sea Longing. Aquatic Half-Elves who remains out of sight of the sea for more than a tenday longs for the sea, suffering a -1 penalty on Wisdom-based checks until she returns to the shore.
- Favored Class: Any
- Automatic Languages: Elven, Common, Home Region (whatever your starting region).
Cheers,