I know it's not from Pennsylvania, but I wanted to put it on here as a demonstration of how even a bizarre-looking thing might not necessarily be a new species. Fosters.com reports that Bill Marconi of Portsmouth, New Hampshire caught this weird-looking blue lobster. Freak lobster colorations result from the individual animal's processing the chemical astaxanthin differently. Total absence of astaxanthin can create white lobsters, many of which have been raised at the New England Aquarium.
The Boston Globe also reported in June that a bright yellow specimen had been caught off the coast of Canada.