Submaripper

The Submaripper is a Tidal Class dragon that first appeared in Dragons: Rise of Berk, although it was created for the fourth season of Race to the Edge.

Official Description
"Hailing from the Tidal Class, the Submaripper has sent many a Viking to a watery grave with its ability to create inescapable whirlpools. Just watch out for its gas bubbles! This dragon is bulky, brawny, and brutal. It can decimate opponents by drawing them near and attacking with one of its mighty limbs or its Viking-size teeth."

- Dragons: Rise of Berk

Egg
The Submaripper egg appears to have a dense, solid core, which is surrounded by a transparent layer of liquid, which is coated by another membrane. Suspended in the substance appears to be several gas bubbles.

Hatchling to Adult
This dragon is massive, said to have teeth the size of Vikings. In addition, it has an unusually large head-to-body ratio for a dragon, and a rounded head and snout. It has several lobs and nubs on its back, along with stripes along its body. The Submaripper has short necks and wings. It also has frog-like legs with webbed feet.

Titan Wing
This dragon, at its Titan stage, is dark green in color. Its snout and stripes are yellow, and its back is a darker shade of red. Its heart shaped spines are bigger, and it has grown some on its feet as well.

Dragons: Race to the Edge, Season 4
The Submaripper make its full appearance in this season.

Dragons: Rise of Berk
It first appeared in this game along with its Titan Wing form.

Trivia

 * Its natural enemy is the Shellfire.
 * This dragon may be related to the Greek myth about Charybdis and Scylla. These two monsters lived in the strait of Messina and the strait was so narrow that sailors would be eaten by the multi-headed beast Scylla in order to avoid Charybdis' whirlpool.