|Power Level||700 Gs|
Selachiark is a Bakugan that resembles an armored shark.
Nate used his Selachiark twice in his brawl against Hideaki. The first time, it turned clear due to Nate's ability card Crystal Clear, and since Hideaki's Kuziell also turned clear, they got to choose their Bakugan's attributes. Since Hideaki chose Haos, Nate chose Ventus so he could use his ability Opposite Eraser, and Selachiark defeated the Kuziell. Later, Nate threw Selachiark in the battle to fight alongside Ichthynoid, due to his gate card Waterfall Dive. Selachiark and Ichthynoid together defeated Hideaki's Reyshu.
- Selachiark's name is derived from Selachimorpha, the name of the superorder that includes sharks, and the word shark.