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

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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.

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