Submaripper

The Submaripper is a vastly dangerous dragon. It attacks when there is stirring of water above it, which awakens it in a rather foul mood. It constantly attacks ships as they stir the water above the Submaripper incredibly. It has been shown to be grateful, and when Hiccup freed it, it saved him from death.

The Submaripper is a natural enemy of the Shellfire. If it senses the Shellfire nearby, it will stop at nothing to attack and defeat it.