Steeltrap

Steeltrap is a Deadly Nadder who was fighting in an arena along with another dragons until Hiccup and the riders set them free.

Appearance
Steeltrap looks like a normal Nadder but with a lot of scars from fighting. He is turquoise with pink feet, belly and nose. He has blue and red wings with some blue spots. His tail has blue and red stripes. His eyes are red.

History
Steeltrap was first seen fighting with Whip-Slash when Ryker was visiting Arena Host.

When Hiccup was captured, Whip-Slash and Steeltrap threatened him but he tell Toothless to not attack them because they're starving, injured and scared. Later, after Hiccup tamed Whip-Slash, Steeltrap try to attack him but Hiccup stayed in the blind spot and scratched the dragon under the chin, conforting him.

After the riders came in rescue and Toothless befriended the Triple Stryke, Hiccup let Steeltrap and the fighter Razorwhip to attack the hunters. Then Steeltrap and the other captured dragons flew free to unknown locations.

Trivia

 * Beside the eyes, Steeltrap looks exactly the same as Scardian.
 * Steeltrap is the only Deadly Nadder with red eyes.