Seashocker

The Seashocker is a Tidal Class dragon that appeared in the movie, How To Train Your Dragon 2.

Appearances
The Seashocker first appear when Toothless is seen dropped into the ocean. They appeared to be the ones that took Toothless to the Dragon Sanctuary while other dragons took Hiccup. Their second appearance is during feeding time. The Seashockers can be seen circling a group of fish when the Bewilderbeast spits fish everywhere to feed the other dragons. They have extremely minor appearances throughout the film.

Characteristics
The Seashocker looks similar to a blue stingray, however it has two heads and very large wings measuring 15m (50 feet) in wingspan with two small flippers in front of it. The dragon 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. In total, the Seashocker's body shape strongly resembles that of a Manta-ray, with wings that extend perfectly straight out. This natural arrangement insures great speed in the air or beneath the waves of an icy ocean. The Seashocker hunts in pods, and uses sonar in order to hunt.

Abilities
Besides the Skrill, the Seashocker is one of the few species to utilize electricity as a weapon. Although it can emit electricity from its mouth, it will be released when it has bitten something, or in a short range just before it nips its target. Their electro-charged bites can take out even the largest enemies. Because of electro-abilities, rather interestingly, electric eels are regarded as the closest evolutionary relative to the Seashocker, which may be the reason eels are feared from almost all dragons.

They are also fearsome hunters like Orcas, equipped with many weapons including dorsal fins, electron 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.

They use their echolocation to locate its prey in deep water like dolphins, porpoises and whales. They use this ability to travel in the deepest depths.

The Seachocker also has the ability to glow in deep dark waters where the light doesn't reach thanks to its bioluminescence. Their dorsal blades are very powerful and sharp that they can cut through the thickest sea ice.

Habitat
The Seashocker lives deep underwater along with the Scauldron, Thunderdrum, and Bewilderbeast.

Trivia

 * They were originally called Oceanzaps.
 * The Seashocker is based on the Sharkworm from How to Train Your Dragon (series): How to Speak Dragonese.
 * So far, the Seashocker is the only dragon with more than one head that is not a Mystery Class dragon. Furthermore, it is the first Tidal Class dragon to have more than one head.
 * The Seashocker is the only species that has not demonstrated any type of raxnged attacks or special abilities in the movie franchise despite the types of abilities that it has are specified.
 * Its name is most likely derived from the sea because it lives in water, as well as the fact that it can shock anything in water with its electrical bite.
 * It is the third dragon known to use electricity as a weapon, first being the Skrill.
 * Like the Hideous Zippleback, the Seashocker has two heads, but lives in the sea.
 * Seashockers are known to swim in pods. They will encircle a group of fish into a bait ball, allowing other dragons to come in and scarf them up.
 * They must have big hearts, as they are able to dive extremely deep, and any large animal needs a large heart to be able to go down or live in the ocean depths.
 * The theory of it having a big heart might be even more necessarry due to the fact that it would need to supply oxygen to 2 brains instead of just 1. This task may be overwhelming even for a big heart, so it may also be possible that they have 2 hearts.
 * They slightly resemble Strafe, a Dinobot from Transformers 4.
 * Seashockers are actually very large dragons as seen on a size comparison with a human from the Dragonpedia. However, in the film they appear to be about the same size as Toothless.
 * The original version looked more like a deep-sea dragon, while the current version looks more like a coastal water dragon.