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Adult Sea Dragon

Huge Dragon · Neutral Evil · CR 16

  • Dragon
  • Huge
  • Tier 3
  • Evil

Adult Sea Dragon, CR 16, fills the huge dragon role with neutral evil disposition. Encounter regions: underwater. Sourced from Tome of Beasts 1.

Stat Block

Challenge Rating
16
Type
Dragon
Size
Huge
Alignment
Neutral Evil
Speed
40, fly 80, swim 60
Habitats
Underwater
Sources
Tome of Beasts 1

Ecology

Adult Sea Dragon is one of the elder species, claiming a wide territory and shaping the ecology around it for centuries. It is most often found in underwater regions. It is huge-sized, which shapes how it hunts, hides, or fights. As a legendary creature, it is rare in the world and likely the only specimen of its kind in the local region.

Behaviour

Adult Sea Dragon is intelligent, vain, long-memoried; it remembers slights for centuries and rewards loyalty in kind. Its Neutral Evil alignment shapes how it engages with the world — predictable in tendency, even when unpredictable in detail. It is intelligent enough to plan, scheme, or remember.

Origin

Adult Sea Dragon is introduced in Kobold Press's Tome of Beasts 1 (2016). Dragons in D&D canon trace to Bahamut and Tiamat, with each lineage having its own founding myth. Within a campaign, its existence anchors a region with the kind of weight only an old, named species carries.

CR 16 monstersAll DragonsUnderwater

Related Monsters

Frequently Asked Questions about Adult Sea Dragon

What is the challenge rating of Adult Sea Dragon?
Adult Sea Dragon has a challenge rating of 16. It fits late-campaign adventuring parties.
What type of creature is Adult Sea Dragon?
Adult Sea Dragon is classified as a dragon in D&D 5e, huge size, neutral evil alignment.
Where does Adult Sea Dragon live?
Adult Sea Dragon is typically encountered in Underwater.
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QR code linking to Adult Sea Dragon — https://www.doungim.com/dnd/monsters/adult-sea-dragon Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/adult-sea-dragon. Point a phone camera at this code to open the Adult Sea Dragon page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.
Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/adult-sea-dragon. Point a phone camera at this code to open the Adult Sea Dragon page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.