30, 2019 3:28 p.m. The Pennsylvania Fish and Boat Commission confirmed Monday that an invasive species, the northern snakehead fish, was recently caught in the Monongahela River. It is the first ...

However, snakeheads can also use their gills to respire underwater, which they often do in the winter months. In summer, and in warmer conditions—which necessitates more oxygen—the fish solely ...

These fish have long dorsal fins that extend down most of their backs, giving them a streamlined shape perfect for fast swimming. The snakehead has an elongated, cylindrical body that can grow up ...