Flashfangs are dragons that only appear in the book: How to Speak Dragonese and the Complete Book of Dragons: Guide To The Dragon Species. They did not select a side in the Dragon Rebellion.
Traits and Abilities
Flashfangs are thin, black dragons with long fangs, a hooked tail and relatively large wings. They are slightly smaller than wolves, and are too small to be ridden, though too large in order to use for the hunt. Though it was stated they were black in How to Speak Dragonese, they were greenish in the "Complete Book of Dragons: Guide To The Dragon Species", despite being called "black panther-like creatures" within its pages.
Flashfangs are very sly, curious and un-trainable dragons, that will often raid the sheep and deer herds of the Vikings. Because of this, the tribes organize hunting parties every now and then, in order to keep their numbers to a limit. They can also speak Dragonese.
Flashfangs are not able to swim.
In the Book Series
The Flashfangs were part of the circus show taking place at the Roman's amphitheater in Fort Sinister. After the Sidewinders had caught and killed all of the rainbow-colored doves, the Flashfangs entered the arena and quickly made short work of them. Shortly after, however, the arena was flooded in preparation for Hiccup's, Camicazi's, and Fishlegs's portion of the entertainment, effectively killing off the Flashfangs.
- How to Speak Dragonese (Book 3), Cressida Cowell. 2005
- The Complete Book of Dragons: Guide To Dragon Species, Cressida Cowell. 2014