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From Pathfinder Howl of the Wild, which isn't enabled.

Apprentice Sea Witch

FEAT 5

You're familiar with the basic spells that most educated merfolk know. Once per day, you can cast either Create Water or Hydraulic Push as a 1st-rank primal innate spell. Each time you cast create water, you choose if you create fresh water or salt water.

Pathfinder Howl of the WildORC