pf2e.fyi
From Pathfinder Lost Omens Ancestry Guide, which isn't enabled.

Pelagic Aptitude

FEAT 1

You've learned special tricks to survive underwater. You gain the trained proficiency rank in Survival.

When in an aquatic environment, if you roll a critical failure on a Survival skill check to Sense Direction or Subsist, you get a failure instead.

Pathfinder Lost Omens Ancestry GuideOGL