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Zebra mussel
A small mollusc that can multiply rapidly. They adhere to boats and can clog inlet pipes. They feed on edible fresh water mussels.

Zebra mussel
Word of the day
Oak Ridges Moraine >> The Oak Ridges Moraine is a unique geographic landform in southern Ontario. Its 160 kilometres of river valleys and rolling hills were formed by advancing and retreating glaciers 12,000 years ago.