A brine dragon can use their hearing as a precise sense at the listed range, but only underwater.
AC 39; Fort +32, Ref +29, Will +30; +2 status to all saves vs. primal
HP 395; Immunities paralyzed, sleep, clumsy, controlled; Resistances acid 15, force 15
+2 Status to All Saves Vs. Primal
+2 to Sense Motive
Regent's Glower(emotion, fear, mental, primal)
Trigger The dragon is critically hit with a melee attack
Effect The dragon focuses their weighty gaze upon their assailant, filling their foe with dread. The triggering creature takes 6d8 mental damage with a DC 35 basic Will save. Any creature who fails the save also becomes Frightened 1 (Frightened 2 on a critical failure).
Effect The dragon uses Pressurized Pool three times. None of the bursts can overlap.
Benthic Bite(primal)
A creature who takes damage from a brine dragon's jaws Strike must succeed at a DC 35 Fortitude save or be Enfeebled 2 for 1 round.
Crushing Breath(primal)
The dragon spews a 100-foot line of pressurized water that deals 18d6 bludgeoning damage with a DC 38 basic Reflex save. A creature that fails the save is also Clumsy 1 (Clumsy 2 on a critical failure) for 1 minute. The dragon can't use Crushing Breath again for 1d4 rounds.
Pressurized Pool(primal)
The dragon expels a 10-foot burst of pressurized water within 120 feet that lasts for 1 minute. A creature other than a brine dragon that enters or begins their turn within a burst must succeed at a DC 38 Fortitude save or become Encumbered until the beginning of their next turn.
Tidal Surge(primal)
The dragon sweeps their wings, creating a 30-foot cone of buffeting water that deals 12d8 bludgeoning damage with a DC 38 basic Fortitude save. Each unattended object and each creature that fails the save is also pushed away from the dragon 20 feet (30 feet on a critical failure) and is knocked Prone. The dragon can't use Tidal Surge again for 1d4 rounds.