Seashocker

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

Appearances
How To Train Your Dragon 2 (Confirmed)

The Seashockers 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 comes up and spits the fish everywhere. They have extremely minor appearances throughout the film.

Characteristics
The Seashocker looks similar to a purple/blue stingray, however it has two heads and very large wings measuring 15m (50feet) in wingspan with two small flaps in front of it. As a whole, the wings look very similar to oars. The dragon also has small spikes lining its spine and the top of its heads. Their dorsal fins are very sharp and function as amazingly powerful blades that are capable of slicing thick sea ice. Its necks are incredibly short. In total, the Seashocker's body shape strongly resembles that of a Manta-ray especially from underside. This dragon weighs 2,200 pounds. The Seashocker hunts in pods, and uses sonar in order to hunt.

Besides the Skrill and Grapple Grounder, the Seashocker is one of the few species to utilize electricity as a weapon.

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

Trivia

 * 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.
 * Its name is possibly 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.
 * 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 were originally called Oceanzaps.
 * 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.