Crab cannon

The Quarren Isolation League fielded many artillery pieces during their battle with the Mon Calamari and the Republic forces, the biggest of which was the crab cannon. This gigantic walker, with its crab-like legs, could climb even vertical underwater cliffs.

History
A manned control center was situated on top of the vehicle, while defensive laser cannons were placed around the central weapon.

To fire its main gun, the walker had to stand still on horizontal ground, due to the immense recoil from firing the destructive, yellow beam. This beam was powerful enough to cut through the hull of Acclamator-class assault ships, causing their reactors to burst and destroy the ship. Several Acclamators were destroyed this way during the Battle of Mon Calamari.

It is unclear whether there were more than one of these walkers, but what is known is that Jedi Master Kit Fisto destroyed a crab cannon with the help of a cavalry of Mon Calamari Knights.

The design of the crab cannon may have been based on the likeness of the Opee sea killer, but this is unknown.

Appearances

 * Star Wars: Clone Wars
 * "Chapter 5"