The anger in your blood rises from the ocean depths, seeded by descent from undersea empires, creeping ichthyic infiltrators into remote seaside villages, or something deeper still.
Underwater Attacks (Su)
At 1st level, your bludgeoning and slashing melee attacks underwater ignore the usual underwater penalties.
Aquatic Adaptation (Ex)
At 4th level, you gain a swim speed of 30 feet and the ability to breathe both underwater and in air. At 8th level, you gain cold resistance 5. At 12th level, your swim speed increases to 60 feet, and you have the 4thlevel benefits of aquatic adaptation constantly, even when not in bloodrage (but not the 8th- and 12th-level benefits).
Wavedarter (Sp, Su)
At 12th level, your bloodrage directs the flow of water to assist you in battle. While underwater, your reach increases by 5 feet and you gain the effects of haste.
At 16th level, as a swift action up to three times per day when underwater, at the start of your turn you can call up a current with a speed up to 20 feet in the direction of your choice in your space (moving with you) that lasts until the end of your turn.
Deep Fury (Su)
Pathfinder Campaign Setting: Aquatic Adventures © 2017, Paizo Inc.; Authors: Amber E. Scott and Mark Seifter.