What is it?! ‘Alien’ invader found in Rocky River

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

CLEVELAND — An ‘alien’ creature emerged from the Rocky River on Friday and has been moved to the Cleveland Museum of Natural History, but not before doing some damage.

According to the Cleveland Metroparks, a sea lamprey made its way from the Atlantic Ocean into Lake Erie by way of the Welland shipping canal.

The parasite was attached to a steelhead trout that was caught in the Rocky River, and left a noticeable wound.

The Cleveland Metroparks called the lamprey “an alien invader to our Great Lakes waters dating back to 1923.”

Because the lamprey is a very ancient lineage representative of the first vertebrates, dating back 500 million years, it is of interest to those who research evolution and medicine.