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

Aquatic Conversationalist

FEAT 5

You can ask questions of, receive answers from, and use the Diplomacy skill with animals with the amphibious or aquatic traits. You gain a +1 circumstance bonus to Make an Impression on such animals.

Pathfinder Lost Omens Ancestry GuideOGL