Gobsucker

The Gobsucker is an original dragon from the How to Train Your Dragon Live Spectacular. As such, it has not made any appearance in other media.

Dragon Appearance
This dragon is small in size. It has a small horn nose and a crest on the back of its head. According to Gobber, this dragon's ability to fly is entirely dependent on the release of explosive gases from its rear end. As such, a viking should never approach this dragon from behind.

In the How to Train Your Dragon Live Spectacular
Gobber first describes this dragon to the academy vikings. It is later seen on the bottom of Gobber's chair. He probably uses this Dragon to move his chair around. Another Gobsucker is seen fighting with vikings of the academy right before their first encounter with a Gronckle.

Trivia

 * The Gobsucker slightly resembles a Rumblehorn.
 * The Gobsucker has a strong resemblance to Boulder Class dragons such as the Gronckle, the Groncicle and the [Hotburple]].
 * Unknown dragon 1 from How to Train Your Dragon 2 somewhat resembles Gobsucker.
 * Because Gobsucker can shoot fire from its rear end, it is possible that this dragon is a member of the Stoker Class.
 * With the Egg Biter appearing in Rise of Berk, it is quite possible that the other two Arena Spectacular dragons: the Stinger and the Gobsucker might also appear in the game.