There has been a report of blue-green algae at the following location: Shubenacadie Grand Lake, HRM, where Fish Lake enters Grand Lake, near Oakfield and Laurie Provincial Parks so we advise no swimming at these parks at this time.. Blue-green algae can be harmful for humans and fatal for pets. To learn more about blue-green algae, visit: https://novascotia.ca/blue-green-algae