Sea lamprey, also known as vampire fish, experienced a population "blip" in the Great Lakes due to COVID-19 challenges pesticide teams faced in 2020 and 2021. Here's what to know.

There is a constant battle in the Great Lakes to combat the sea lamprey population. These invasive creatures resemble eels and feed like leaches, but they’re neither of those things. They’re fish.

A man in Alexandria, Virginia caught a vampire fish in the Potomac River that is rarely seen by human eyes. While people called for him to kill it, experts said the fish is a good sign.

According to the U.S. Fish and Wildlife Service, sea lamprey is distinguished by its long, eel-like body that is typically 12-20 inches long. They are usually brown and yellow, with a lighter ...