From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Coral Armor

ITEM 0

ADJUSTED AQUADYNAMIC

Price 5 gp

Bulk 2

Category medium

Group skeletal

AC Bonus +3

Dex Cap +2

Strength +2

Check Penalty −2

Speed Penalty −5 ft.

A good option for undersea explorers and aquatic peoples alike, coral armor consists of panels of carved coral. If worn underwater, some of this coral can even be alive.

Pathfinder Treasure Vault (Remastered)ORC