Slugterra (2012)

S1E11 Endangered Species

After years of being considered a myth, an Enigmo Slug has been discovered. The stakes are high as the bidding for this elusive slug heats up, attracting fierce competition. Eli and his friends manage to outsmart Slugterra's most notorious slug hunter to secure the rare prize, but their victory is short-lived as the hunter turns his sights on them, intent on reclaiming what they’ve taken.