1990 Press Photo Zebra Mussels, about dime size, can help clean up Great Lakes

International researchers say zebra mussels, which are about the size of a dime, can help clean up the Great Lakes. Since arriving from Europe, the zebra mussel has become a Great Lakes scourge. But researchers now have found a good side to the shellfish. Few predators or diseases to check populations.

Photo measures 9.5 x 6.75 inches. Photo is dated 06-12-1990.

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