Feud against the Hooligans
As revealed in "Underworld", many years before the events of the comic, the Rogue Submaripper attacked a ship carrying both Captain Fiske and his second-in command, Stoick. It killed half of Fiske's crew and ripped off one of his arms and one of his legs. It would have killed Fiske as well if Stoick hadn't saved him. Fiske wanted to hunt for the dragon, but Stoick refused for fear of losing more lives. Fiske, knowing that he had lost Stoick's support, left Berk to hunt the dragon for himself. He was never successful.
Many years later, Stoick, Gobber, and a crew of Vikings were sailing in the Veil of Mists due to a shortage of fish on Berk when the same Submaripper attacked again. After throwing itself onto the boat and nearly destroying it, the dragon wrapped Stoick with its tail and tried to drag him to the bottom of the sea in order to eat him. Fortunately, Stoick was able to stab the Submaripper in the tail, forcing it to let him go.
When Stoick and Gobber later returned to the Veil of Mists to find and stop a menace that was destroying Berk's ships, they encountered the same Submaripper again. This time, it attacked out of revenge for its earlier defeats, with Stoick being its specific target. Fortunately, Astrid and Stormfly were able to distract it and get it to chase them. The two led the Submaripper into the Caves of Jotunn, where Fiske had captured the rest of the Dragon Riders earlier. The Submaripper, too angry in its chase to see where it was going, crashed into the cave roof, causing both it and Fiske to be trapped in the cave. Its fate remains unknown.
- This Submaripper is the first of its species to ever be seen.
- This Submaripper is the only dragon to have visible blood flowing from its wounds. This can be seen when Stoick stabs it in the tail.
- This Submaripper is similar to both Toothless' Nemesis and Hookfang's Nemesis in that it holds a grudge against one of the main characters, in its case, Stoick.
- However, unlike the other two, it also holds a grudge against one of the villains, in its case, Fiske.
- It is also the one of the three who's grudge is not against another dragon.
- This Submaripper's relationship with Fiske is a reference to the relationship between Captain Ahab and Moby Dick in the novel Moby Dick.