Seadramon

Seadramon is an aquatic Digimon from the Digimon series. He is the Digivolved form of Betamon.

Special evolution

 * DNA Digivolution (Ultimate) - Gesomon + Seadramon = Dragomon
 * DNA Digivolution (Ultimate) - Coelamon + Seadramon = Scorpiomon

First Season (Digimon Adventure)
During their first night in the Digital World, the DigiDestined came across an abandoned trolley car on the shores of Dragon's Eye Lake, where they decided to spend the night. However, Tai and Agumon accidentally struck a large, red, leaf-like object with ember from the fire - and it turned out to be the tail of a very angry Seadramon, who retaliated by dragging the chunk of shore with the trolley car on it to the middle of the lake. Matt was the only one not on that part of the shore and leapt into the water to save the others. But Seadramon noticed him and grabbed him with his coils. To save him, Gabumon Digivolved to Garurumon for the first time and battled Seadramon, seeing him off.

Second Season (Digimon 02)
Seadramon was the digivolved form of Betamon, Michael's (an American DigiDestined) Digimonpartner. He evolved the first time when the group, who was in Digitamamon's restaurant, was attacked by a Dark-Spiral controlled Gorillamon. Seadramon then attacked Gorillamon and dragged him underwater, until Togemon destroyed the Spiral. Michael and his Seadramon showed up again later when Digimon had begun to appear in the Real World around Christmas time and battled a Cherrymon at Rockefeller Center with help from ExVeemon, Lillymon and the other American DigiDestined's Digimon. Michael and Seadramon also appeared in the final battle against MaloMyotismon.

Digimon Tamers
A Seadramon was one of the Digimon seen in the sky during Vikaralamon's rampage in Shinjuku.