Stronger Underwater:
All Stats Increase by 1 when Underwater.
Swimming Speed increase from 30 feet to 60 feet
When completely submerged in water add +10 to Dex(Sneak) checks
You gain the ability to detect if it will rain the following day and also the ability to discern if a body of water is fresh or salt. if its pure or tainted. if so how is it tainted (DM Digression)
Resistant to Poison Damage
Resistant to Cold Temperatures and Climates (does not include damage sources)