pf2e.fyi
From Pathfinder Lost Omens High Seas, which isn't enabled.

Marine Marauder Dedication

FEAT 2
Archetype Marine Marauder
Prerequisites trained in Athletics

You're as skilled in combat underwater as on land. You gain the Underwater Marauder skill feat, and when you roll a success on an Athletics check to Swim, you get a critical success instead. In addition, checks to Escape or Force Open nets you use are attempted against your class DC instead of the listed DC, and you can keep hold of a target you've grappled with a net with one hand.

Pathfinder Lost Omens High SeasORC