Hellbender T-shirtAKA the Snot Otter. The Allegheny Alligator. The Mud Devil. A little biology lesson for yinz: With a flattened body designed to wedge under river rocks and skin folds specialized for absorbing oxygen from whitewater, the Hellbender is proof that the water you're spotting them is an extremely healthy river system. What a cool critter to rep on your t shirt. Now go, spread the word of these prehistoric legends.