Other Aquatic reports in Pennsylvania
3 cases, best-documented first. Page 1 of 1.
We map claims, not creatures. A case is what some source says someone saw or heard, with the link to that source. It is not proof that anything was there, and a retelling counts once, not as a second sighting.

Other Aquatic · Pittsburgh, Pennsylvania · 1896
Rev. W. A. Talcott reports a narrow escape from the jaws of a mammoth sea turtle that grabbed his coat tail while he sat on an express truck at a Pittsburgh station.

Other Aquatic · Philadelphia, Pennsylvania · 1861
Dr. [name] recalled seeing a royal big whale in the Delaware River in Philadelphia around 1861.

Other Aquatic · Monongahela River, Pennsylvania
Reports exist of a giant turtle or serpentine creature called the Ogua on the Monongahela River that can crawl onto land and eat deer.