From Pathfinder Lost Omens Absalom, City of Lost Omens, which isn't enabled.

Surface Skimmer

FEAT 1

By sinking gently beneath the waves, you obscure your presence and utilize the water as a barrier between you and land combatants. While you are submerged just below the water's surface, you have cover from attacks made by creatures out of the water.

Pathfinder Lost Omens Absalom, City of Lost OmensOGL