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

Familiar of Overwhelming Tides

FAMILIAR ABILITY

Your familiar constantly drips with ocean water. When you Cast or Sustain a hex, you can cause a small wave to surge forth from your familiar. One creature within 10 feet of your familiar is pushed 5 feet away from your familiar.

Pathfinder Howl of the WildORC