pf2e.fyi
From Pathfinder Howl of the Wild, which isn't enabled.

Coral Detoxification

FEAT 9
ATHAMARU
Activity 2 actions
Prerequisites Coral Symbiotes
Frequency once per hour

The coral colony that you've tended has merged with your kidneys to add an additional layer of filtration. Attempt a saving throw against a single poison affecting you with a +2 circumstance bonus.

Pathfinder Howl of the WildORC