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Hiccup: "I don't think we've ever seen this before."
Fishlegs: "Oh boy! Another deep dweller?!"[src]
   

The Fathomfin is a gigantic Tidal Class dragon that first appeared in The Serpent's Heir.

Physical Appearance

Hatchling to Adult

The Fathomfin is a gigantic dragon that is mainly blue with dark green spots. It has a large fin lining its back and barnacles covering certain parts of its body, similar to real-life baleen whales.

Abilities

Expandable Gullet

The Fathomfin has an expandable, pelican-like throat. When expanded, its skin becomes translucent, allowing its rider to see through it and observe their surroundings, similar to a glass bottom boat[1].

Behavior and Personality

Not much is known about the Fathomfin's personality or behavior, but they are generally peaceful dragons.

Appearances

Graphic Novels

The Serpent's Heir

When the Dragon Riders are about to reach Nepenthe, Hiccup uses his spyglass to observe a Fathomfin surfacing in the distance before commenting on its mysterious presence. Fishlegs immediately got excited about it and wants to know more about the new dragon, but Hiccup tells him that investigating the situation on Nepenthe is currently more important than studying the Fathomfin.

The Fire Tides

According to Richard Hamilton, the Fathomfin helps the Dragon Riders discover the remnants of a sunken Viking civilization.

Trivia

  • The Fathomfin's name was first revealed in a commentary regarding the graphic novel project The Fire Tides[2].

Gallery

References

  1. Headlines and Dragonvines: A Conversation with Richard Hamilton. (Date Posted - October 2, 2018). Dragon Academy Dropouts on Tumblr.
  2. "It also has some big moments for Astrid, a Viking Atlantis, the Fathomfin dragon 1st teased in #TheSerpentsHeir — oh, and a shirtless Hiccup." (Date Posted - September 15, 2018). Twitter.

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