From Pathfinder Lost Omens The Mwangi Expanse, which isn't enabled.

Fangs

ANCESTRY FEATURE

You were born with a natural means for hunting and self-defense. You gain a fangs unarmed attack that deals 1d6 piercing damage. Your fangs are in the brawling group and have the finesse and unarmed traits.

Pathfinder Lost Omens The Mwangi ExpanseOGL