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For a number of weeks now, I had noticed a heavy accumulation of an aquatic herb at the shoreline of Frog Pond. Initially I assumed it might be Ceratophyllum (hornwort) or Myriophyllum (water milfoil), both reported from Nova Scotia. However, the plant has opposite leaves, which are fan-like, finely divided. I am now certain it is a species of Cabomba, most likely Cabomba caroliniana. The species is not native to NS, but used in aquariums. Maybe this introduction was the result of an aquarium dump. (Could have happened a few years back when a Gold Fish or a Koi was seen in the pond.) In other regions of the world Cabomba is a problematic invasive. Is it problematic here as well? Have people seen this in other parts of Nova Scotia? Wikipedia links to the species mentioned above: https://en.wikipedia.org/wiki/Ceratophyllum https://en.wikipedia.org/wiki/Myriophyllum https://en.wikipedia.org/wiki/Cabomba_caroliniana
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