Brine May Feat 1
Source Pathfinder Player Core
Your mother was a sea hag, granting you one sea-green or blue eye. You find comfort both in the sea and on the shore. Whenever you roll a success on an Athletics check to Swim, you get a critical success instead. If you end your turn in water without having succeeded at a Swim action that round, you don't sink (but you might still be moved by the current).
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
ChangelingA creature with this trait has the changeling versatile heritage. Changelings are the children of hags and members of other humanoid ancestries. An ability with this trait can be used or selected only by changelings.
LineageA feat with this trait indicates a character's descendance from a particular type of creature. You can have only one lineage feat. You can select a lineage feat only at 1st level, and you can't retrain into or out of these feats.