Armor Class 14 (natural armor)
Hit Points 52 (8d8 + 16)
Speed 30 ft., swim 30 ft.
Saving Throws WIS +5
Skills Athletics +4, Perception +5, Survival +5
Senses passive Perception 15
Languages Draconic
Challenge 3
Hold Breath. The subchief can hold its breath for 15 minutes.
Tooth Dagger. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage.
Jaws of Semuanya (Recharge 5–6). The subchief invokes the primal magic of Semuanya, summoning a spectral maw around a target it can see within 60 feet of it. The target must make a DC 13 Dexterity saving throw, taking 22 (5d8) piercing damage on a failed save, or half as much damage on a successful one. A creature that fails this saving throw is also frightened until the end of its next turn.
GoS, p. 242