Dragon Turtle

Gargantuan Dragon, Neutral

AC: 20

Initiative: +6 (16)

HP: 356 (23d20 + 115)

Speed: 20 ft., swim 50 ft.

STR: 25 (+7)
DEX: 10 (+0)
CON: 20 (+5)
INT: 10 (+0)
WIS: 12 (+1)
CHA: 12 (+1)

Saving Throws: Con +11, Wis +7

Resistances: fire

Senses: Darkvision 120 ft., Passive Perception 11

Languages: Draconic, Primordial (Aquan)

CR: 17 (XP 18,000; PB +6)

Habitat: Coastal, Underwater

Treasure: Any

Amphibious.

The dragon can breathe air and water.

Actions

Multiattack.

The dragon makes three Bite attacks. It can replace one attack with a Tail attack.

Bite.

Melee Attack Roll: +13, reach 15 ft. Hit: 23 (3d10 + 7) Piercing damage plus 7 (2d6) Fire damage. Being underwater doesn't grant Resistance to this Fire damage.

Tail.

Melee Attack Roll: +13, reach 15 ft. Hit: 18 (2d10 + 7) Bludgeoning damage. If the target is a Huge or smaller creature, it has the Prone condition.

Steam Breath (Recharge 5-6).

Constitution Saving Throw: DC 19, each creature in a 60-foot Cone. Failure: 56 (16d6) Fire damage. Success: Half damage. Failure or Success: Being underwater doesn't grant Resistance to this Fire damage.

Find this creature in the encounter builder

Source: Monster Manual (2025), p. 103 - Licenses and attribution