Petromyzon marinus

Petromyzon marinus, commonly known as the sea lamprey, is a jawless fish with a tubular, eel-like body. native to the Atlantic Ocean but invasive in the Great Lakes. It uses a round, sucker-like mouth lined with sharp teeth to latch onto other fish, parasitically feeding on their blood and bodily fluids. While it plays a role in its natural environment, its invasive presence in freshwater ecosystems has caused significant harm to native fish populations. Sea lampreys are an important species for scientific study due to their unique biology and impact on aquatic ecosystems.