Aquatic Eyes Feat 1
Source Pathfinder Lost Omens: Ancestry Guide
As your connection to water grows, you can see more easily in places with less light, such as the depths of the ocean. You gain Low-Light Vision, or you gain Darkvision if your ancestry already has low-light vision.
Special If your ancestry has neither low-light vision nor darkvision, you can take this ancestry feat a second time to gain darkvision. You can't retrain out of this feat.
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.
UndineA type of geniekin descended from a being from the Plane of Water.