The flat-headed, mucus-covered salamander recently named Pennsylvania’s state amphibian goes by many names: snot otter, lasagna lizard, devil dog, mud-devil, grampus, Allegheny alligator. Most commonly, however, they’re known as the Eastern hellbender. The big, slimy amphibians are found under large, flat rocks in Pennsylvania’s fast-moving rivers and streams, such as the Youghiogheny River. They rarely …