This mount has a cannon on its back. The cannon is used to shoot a cannonball to destroy blocks or damage enemies. The cannon is a hidden item, the Turtle Tank Cannon which can be found only in game's coding.
Like other tortoise, the Tank Turtle can be mounted on ground including boating on water.
The Turtle Tank is the second slowest mount in Trove, having only 75 speed, compared to the 65 Movement Speed of Slow Sebastian.