How to Train Your Dragon Wiki
How to Train Your Dragon Wiki

The Seashocker is capable of emitting underwater sonar, and these dragons travel in schools or pods, similar to fish and dolphins. [src]

The Seashocker is a large Tidal Class dragon that first appeared in How to Train Your Dragon 2.

Official Description

Supremely furtive, Seashockers share attributes with many of the the ocean's most extraordinary creature: the morphology of a Manta Ray, the sonar of a dolphin, and the bioluminescence of a deep dweller.
Similar to Hideous Zipplebacks, the Seashocker also possess two heads. But unlike their airborne cousins, Seashockers only have one thing on their twin heads: predation. If you ever see their dark fins amongst the waves, it's it's already too late for you - the rest of their pod has already moved in to attack!
Being water-based dragons, Seashockers do not breathe fire. Instead, their bites paralyze victims with an electrical charge that stuns even the biggest prey into submission. Perhaps this is the reason why all dragons fear the Seashocker's closest evolutionary relative - the electric eel!
Seashockers are wonderful ice-breakers, but not in the conversational sense -- their dorsal fins, comprised of super-dense cartilage, can cut through even the most frigid floes, allowing Seashockers to carve a path to any ice-bound prey.
A deep diver of the Tidal Class that travels in large groups (or pods). It emits underwater sonar to stealthily detect unsuspecting prey... or overboard Vikings!
The mighty Seashocker builds up a powerful charge of electricity that it unleashes on it's opponents in battle.
  Dragons: Rise of Berk  



In the earlier stages of development of How to Train Your Dragon 2, the Seashocker was initially named the "Oceanzap". This appeared on some early promotional posters for the movie. The reason for changing the species' name has never been revealed.

Physical Appearance

Seashocker Egg.jpeg


The eggs of a Seashocker tapers towards its tip, giving it a pointy, rounded triangle shape. They have several lighter spots around their base.

Hatchling to Adult

The Seashocker looks similar to a blue Manta Ray, which is more noticeable when seen in a bird's eye view. It has two heads and has large a wingspan of 15 meters (50 feet) with two small flippers in front of it, giving it the appearance of a blue colored Manta Ray. The Seashocker also has small spikes lining its spine and the top of its heads. Their dorsal fins are very sharp and dense, functioning as amazingly powerful blades that are capable of slicing thick sea ices and even the most solid floes. Its necks are incredibly short. Overall, the Seashocker's body shape strongly resembles that of a Manta Ray, with wings that extend perfectly straight out. This natural arrangement ensures great speed in the air or beneath the waves of an icy ocean.

Titan Wing Seashocker.png

Titan Wing

Titan Wing Seashockers have jaws full of spikes and their body is bright yellow. Furthermore, white stripes streak across their wings and its edges are purple. They have light blue spines on their two necks that merge together to form one row of spines on their backs. They have a cluster of spikes at the tip of their tails.



The Seashockers electric bite

Seashockers gain their name from their unique ability to generate electrical discharges. These blasts work particularly well underwater, as sea water is a conductor of electricity. Although they can emit electricity from their mouths, it will be released when they have bitten something, or in a short range just before they nip their targets. Their electro-charged bites can take out even the largest enemies.

Seashocker using its electric field against two Scauldrons

As seen in “Shock and Awe”, Seashockers are able to generate a field of electricity as a protection around themselves by joining their heads together. An electrical current can be produced by the snout of each head. When the electrical current joins together, it generates an electrical field, similar to the one made by Skrills. The energy released creates an electrical force so powerful, that even large dragons such as Scauldrons, after being electrocuted, would be ejected/repelled forcefully. It can also apparently eject from itself a human up to approximately 60 feet.

The teamwork of 2 Scauldrons.gif

Hunting and Diving

Valka shows how the dragons receive food.gif

Seashockers are able to dive extremely deep in search of their preferred prey; small, deep-sea fish. Seashockers are also fearsome hunters, similar to Orcas in their lifestyle and intelligence, and are equipped with many weapons including dorsal fins, electric charges, and two heads. Hunting in groups, the Seashocker is an expert in the sneak attack. If you see its fin in the water, then the rest of its pod has already moved in to attack.

Seashockers are often found hunting in packs or pods and use great teamwork. This helps them to take down large prey easily. They have also been seen herding schools of fish into a Bewilderbeast's mouth by circling around them.


As shown by Bolt & Float, Seashockers are able to even see their natural predator, Scauldrons, from a distance.gif

They use echolocation to locate its prey in deep water like dolphins, porpoises, and whales. The underwater sonar they emit allows them to stealthily detect prey. They use this ability to travel to the deepest depths. As shown by Bolt & Float, Seashockers are able to even see their natural predator, Scauldrons, from a distance.

The Seashocker also has the ability to glow in deep dark waters.gif


The Seashocker also has the ability to glow in deep dark waters where the light doesn't reach thanks to its bioluminescence. As shown by Bolt & Float, Seashockers glow for better vision and navigation in deeper, darker waters.

Speed and Agility

The Seashocker's Speed.gif

Seashockers are fast and agile enough to outmaneuver Scauldrons, as well as to ambush its prey. According to Fishlegs, Seashockers move too fast for the human eye to see.

Some Seashockers saves T..gif

Strength and Stamina

Seashocker used as a mean of transport.gif

Seashockers are strong enough to pull boats occupied by humans, as well as carry humans and other dragons on their backs, with little effort. As shown by Bolt & Float, despite starving from not eating any deep sea fish, Seashockers are able to still swim fast without showing any lack of stamina. They also have dorsal blades are very powerful and sharp enough they can cut through the thickest sea ice. They are composed of super-dense cartilage, which allows them to cut through floating sheets of ice to get to their prey.


Scauldrons Sensing

The sense the electric field produced by Seashocker.gif

The Seashockers' shocking ability produces an electric pulse that Scauldrons can sense, allowing them to track down and prey on the former.

Dry Land

Seashockers lack legs and on land are as helpless as a stranded whale.gif

Like many Tidal Class dragons, Seashockers cannot last very long out of water and will quickly dry up. Furthermore, unlike other Tidal Class dragons, Seashockers lack legs and on land are as helpless as a stranded whale.

Pod Dependency

Seashockers live in pods, which gives them their great power.gif

Similar to Scauldrons, Seashockers live in pods, which gives them their great power. When a Seashocker is without its pod, it can be defeated with less struggle.

Seashockers are very weak flyers, as their wings are designed to be more like paddles for swimming in water.gif


In addition, despite possessing wings, Seashockers are very weak flyers, as their wings are designed to be more like paddles for swimming in water. This is why Valka's Seashockers brought Toothless to the shores of Valka's Mountain and gave him to Sailback instead of flying him up themselves.

Behavior and Personality

Still, it's a good thing Toothless saw all of this wreckage from above. Otherwise, you might've ended up as that Seashocker's breakfast. [src]
  — Hiccup  
But on some occasions, like the dragon's feeding time, Seashockers can appear near the surface.gif

The Seashocker lives in very deep, icy waters, where it can use echolocation instead of sight to hunt prey. It can also use its bioluminescence as an attraction to deep sea fish. But on some occasions, like the dragon's feeding time, Seashockers can appear near the surface where they can help the Bewilderbeast draw fish into its mouth by circling around. In return, some fish are given to them.

Their most remarkable feature would be their teamwork. They often hunt in pods and circle their prey into a tight 'bait ball'. They move swiftly together and use it both to hunt and care for their young. Seashockers will also work together to defend against predators, as seen in "Shock and Awe" where they use their own electrical shocks to drive off a pack of Scauldrons.

Seashockers have been known to scavenge flotsam at sea.gif

Despite a diet mainly consisting of deep-sea fish, Seashockers have been known to scavenge flotsam at sea, even if the 'debris' is a Human or a dragon egg, as seen in Dreamworks Press: Dragons. This behavior is mentioned again in Dragons: Rise of Berk, where it is outright stated that Seashockers of Bloodspilt Bay hunt and kill humans for food. Since the human subject in Dreamworks Press: Dragons is struggling to swim in the water and therefore emitting increased electrical signals, it is possible a Seashocker - like a shark - can be attracted to the human as possible prey in this manner.


Fishlegs bonds with Folt and Bloat.gif

You can train a Seashocker if you heal its injuries or return it to its pod.

Comparative Statistics


Dragons: Race to the Edge

Season 2

Main article: Bolt & Float

Seashockers make their first chronological appearance one year before the second film in "Shock and Awe". The first Seashocker is a male that got separated from his pod and ended up in the lagoon of Dragon's Edge. He eventually met

Fishlegs with a Seashocker.gif

and interacted with the Dragon Riders, especially Fishlegs, who was mesmerized by the dragon and bonded with him. The Riders tried to help the Seashocker return to the open ocean, but several Scauldrons tracked down and hunted the Seashocker through the lagoon. Fishlegs came to the Seashocker's rescue by joining both heads together, generating an electrical field that pushed the Scauldrons back. Eventually, more Seashockers came to the rescue, using their electrical shocks to chase away the Scauldrons, and they all swam back into the ocean.

Season 4

Main article: Viggo's Seashockers

In "Dire Straits", Ryker and Viggo had a pair of Seashockers pull their dinghy in order to escape the Dragon Riders who have just successfully freed a chained Submaripper.

Season 6

Many Seashockers were summoned by the Berserker Bewilderbeast during the final battle in "King of Dragons, Part 2".

How to Train Your Dragon 2

Main article: Valka's Seashockers

When Toothless is dropped into the ocean, Valka's Seashockers come from the depths and take him under their wings for protection. They take Toothless to the shores of the Dragon Sanctuary, where he was picked up by Sailback, while Clawlifter took Hiccup. During feeding time, three Seashockers can be seen circling a school of fish, herding them into the Bewilderbeast's mouth, who then spits the fish everywhere to feed the other dragons.

How to Train Your Dragon: The Hidden World

Several Seashockers can be seen splashing around the waters of the Isle of Berk as the Dragon Riders return from one of their rescue missions.

Seashockers are among the myriad of dragons that reside in the Hidden World.

Though not shown, it is possible that the Seashockers of Berk followed their Alpha to New Berk before moving on to the Hidden World.

Graphic Novels

The Serpent's Heir

Several Seashockers appear along other Tidal Class dragons that offer tribute to Toothless, their new Alpha. The Twins decide to ride two of them, whom they later name Soaky and Wetty.

Dreamworks Press: Dragons

A Seashocker briefly appears in this game. It is seen swimming among the wreckage of the ship carrying the player and a mysterious dragon egg. Eventually, it notices the player and the egg and is about to attack them when Hiccup and Toothless arrive and chase it off, saving both the player and the egg.


Seashocker Stats.jpg

Dragons: Rise of Berk

The Seashocker appeared in this game after the second film aired. Valka's Seashocker, Covecharger, Wavewight, Rane & Shyne and Bolt & Float also became available.

School of Dragons

Seashockers are mentioned in a Stable Quest called "Rising Shockers". The player can send non-active dragons from their stables to complete missions for points and rewards.

Seashockers have risen up from the depths and must be diverted away from trade routes.
  School of Dragons  

A school of Seashockers is also mentioned in the quest log, which shows what the dragons have been doing during the quest.

As of March 2018, a NPC Seashocker was seen in the Expansion "Wrath of Stormheart" as a dragon of Nikora Stormheart.

Dragons: Titan Uprising

Although they do not currently appear in the game, Seashockers are mentioned in the description of the Timberjack Lithe Loggerjammer.

Due to her cool, calculated composure (a rarity among anxious Timberjacks), Loggerjammer is one of the few Sharp Class dragons to actually befriend Tidal Class breeds. Entire pods of Scauldrons and Seashockers will follow her into battle, knowing that she will always lead them to victory.
  Dragons: Titan Uprising  

DreamWorks Dragons: Dawn of New Riders

The Seashocker is mentioned indirectly in this game. The player-controlled character Scribbler can find special treasure, including the "Sea Shocker Blade" which can be used to upgrade Scribbler's axe.


  • Asterisk-Transparent.pngThe official measurements of the Seashocker, as released by DreamWorks Animation are 52 feet (15.84 meters) in length, and 50 feet (15.24 meters) in wingspan.
  • It is likely that, like many other deep-diving animals, the Seashocker possesses several specialized features to withstand the pressure of the deep ocean. These features include a heart that can decrease its heart rate, collapsible lungs and ribcage that can reduce air pockets, expel 90% of the air inside of the lungs, and decrease their buoyancy, blood and muscles that can store oxygen, the ability to cut off the flow of oxygen to nonessential parts of the body, the ability to limit movement, and the ability to shut down breathing, digestion, kidney function, and liver function.
  • The Dragonpedia states that Seashockers are cousins of Hideous Zipplebacks. It is possible that Seashockers share a common two-headed ancestor with Hideous Zipplebacks, since extreme adaptations likely evolved once.
    • Another reason they might be related is because they both have wide squat bodies.
    • If they are related, the Zippleback's spark might have relatedness with the seashocker's electricity.
  • The Seashocker shares many similarities with the Sharkworm from the books.
  • Seashockers slightly resemble Strafe, a Dinobot from Transformers: Age of Extinction.
  • According to Dean DeBlois, the dragon's name is actually spelled as “Sea Shocker”.
  • Seashockers have gill-like slits at the sides of their chest. This is likely a nod to Sting Rays which the dragon was designed after.


Seashocker uses Creative Commons Licensed content from the Rise of Berk Wiki page Seashocker. The list of authors can be found on the page revision history (view authors). ROBWiki Logo.png
Seashocker uses Creative Commons Licensed content from the Dreamworks School of Dragons Wiki page Seashocker. The list of authors can be found on the page revision history (view authors). SODWikiLogo.png

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