The Mechaneers are Captain Kork's robots army that appeared in the Ben 10: Omniverse episode Gone Fishin.
They seem to look similar to crabs.
Captain Kork used an army of Mechaneers to capture Magister Patelliday and battle Ben, Rook, and Max, but most of them were destroyed in battle.
Powers and Abilities
They have extendable claws that resemble crab claws which cuts through anything in their way.