How to Train Your Dragon Wiki
How to Train Your Dragon Wiki
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Original Dragon Class symbols designed by Bork the Bold

Updated Class symbols as of How to Train Your Dragon: The Hidden World

The dragons known to the Hairy Hooligan Tribe are grouped into seven "classes" based on their similar abilities or features (unlike modern taxonomy that is based on shared physical characteristics). Dragons can also be moved between classes if new discoveries about a species make it necessary.

The seven classes are Boulder, Mystery, Sharp, Stoker, Strike, Tidal and Tracker. As mentioned in the exclusive short, Book of Dragons, and in "We Are Family, Part 2", Gobber's great-great-great-grandfather, Bork the Bold, was the first to categorize dragons into different classes.

Boulder Class

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Boulder Class.png

Boulder Class dragons are tough and associated with the earth. They can eat rocks, which many of them melt within their stomachs and regurgitate as lava blasts. Although they have small wings compared to their body size, they are able to fly as fast and as high as most other dragons can. According to Fishlegs in Rise of Berk, Boulder Class dragons aren't picky eaters. The dragon species included are:

Rescue Riders

Mystery Class

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Mystery Class.png

Little is known about the Mystery Class dragons, due to their stealthy and sneaky nature. Dragons in this class are generally more feared than those in other classes. This Class tends to include the most diverse and interesting range of dragons out of all, most of which exhibit extremely rare and unique traits. The dragon species included are:

Rescue Riders

The Nine Realms

Sharp Class

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Sharp Class.png

Sharp Class dragons are vain and prideful, and all of them possess sharp body parts. Most of these dragons can fire extremely sharp and poisonous projectiles from their bodies, which can quickly be regenerated. Sharp class dragons adore being stroked and generally made a fuss of. They especially love being complimented, due to their nature. The dragon species included in this class are:

Stoker Class

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Stoker Class.png

Stoker Class dragons are hot-headed fire breathers. A notable characteristic of these dragons is their high shot limit and firepower. Some of them are capable of setting themselves, or a part of their body on fire. When Stoker Class dragons become sick or exhausted, they might loose their ability to produce flames. This state can be fatal, although a Fireworm Queen's venom or Firecomb can reignite their inner flame. The dragon species included are:

Rescue Riders

Strike Class

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Strike Class.png

Strike Class dragons are characterized by their extreme speed, high jaw strength, and superior intelligence. Some members of this Class possess pinpoint accuracy and unique abilities that allow them to navigate in their respective environment/atmosphere. The dragon species included are:

Rescue Riders

Tidal Class

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Tidal Class.png

Almost all Tidal Class dragons live in ocean, although some of them have amphibian biology allowing them to survive on land. Few of these dragons are cable of creating flames, but many can generate electricity. Dragons of this class are generally larger than those of other classes. Despite this, they are usually very peaceful ocean dwellers who prefer to be left alone and when trained, are exceedingly loyal. According to Hiccup, Tidal Class dragons don't react well to signs of aggression. The dragon species included are:

Rescue Riders

The Nine Realms

Tracker Class

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Tracker Class.png

The Tracker Class is the newest class of dragons, discovered during the events of Race to the Edge. Natural born hunters, Tracker Class dragons have a highly acute sense of smell and taste that enables them to effortlessly track down and find anything. The dragon species included are:

Rescue Riders

The Nine Realms

Unknown Class

Some species of dragons have not yet been officially classified into any class and may be sorted in the future. The reasons for this lack of information varies. Firstly, it's simply because the dragon is too new or had only made very few appearances in media. The currently unclassified dragons are an original dragon from the Arena Spectacular, four unnamed dragon species in How to Train Your Dragon 2, the unknown dragons on Hiccup's map in How to Train Your Dragon 2, the three unidentified dragons that appear in the Book of Dragons and one that is considered to be mythical.

Other Classes

Fear Class

Fear Class dragons are stealthy, sneaky, and often have multiple heads. The dragons of this class are the Hideous Zippleback, the Flightmare, and the Snaptrapper. This class was removed and replaced with the Tracker Class, as Vikings no longer feared dragons. The dragons that are in this class are:


  • The Mystery Class may be a sort of "temporary" class, where dragons are put when little is known about them. Once they are more thoroughly understood, they would be moved to another class.
    • However, due to all of the Fear Class dragons being moved into the Mystery Class, this may no longer be true.
  • It has been shown that the dragons are occasionally reclassified. The Deadly Nadder was a Sharp Class dragon until it was moved to the Tracker Class. All Fear Class dragons were moved into the Mystery Class. The Red Death was originally a Mystery Class dragon, but then moved to Stoker Class. The Snafflefang was also originally in Stoker Class, but was moved to the Boulder Class.
  • With twenty known species, the Mystery Class is currently the largest Dragon Class.
  • The Submaripper and the Hobgobbler are the only dragons confirmed to belong in two classes.


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