Invasive snail creeps up on Nova Scotia lakes, ponds

The Chinese mystery snail, also known as the trapdoor snail, is causing concern in Nova Scotia due to its invasive nature. Measuring at seven centimetres, this aquatic snail may seem unassuming, but it has the potential to outcompete other snail species and disrupt the water quality of ponds and lakes.

According to Ken Donnelly of the Nova Scotia Invasive Species Council, sightings of the Chinese mystery snail have been on the rise in the past month. The snails have been predominantly observed in the Halifax and Dartmouth areas, with some sightings as far as Annapolis Royal and Sydney. Donnelly noted that the snails were first reported in Ontario over 90 years ago and have slowly spread across the country.

One possible explanation for the presence of these snails in Nova Scotia is their availability in pet stores. Jerry Wang, owner of Shrimp Lover & Tropical Fish in Dartmouth, emphasized the importance of responsible pet ownership. Wang cautioned against releasing any imported species, alive or dead, into the wild. He highlighted the reproductive capabilities of the Chinese mystery snail, with a single female capable of producing up to 130 offspring at once.

In other provinces like Alberta, it is illegal to possess, release, sell, or transport the Chinese mystery snail. Once established in an ecosystem, these snails are challenging to eradicate. Molluscicides, commonly used to manage similar species, have proven ineffective against the Chinese mystery snail. Additionally, the use of chemicals could harm native species, making containment the preferred method of control.

Donnelly advised individuals to remain vigilant when fishing, kayaking, or swimming in local bodies of water. If they suspect they have spotted Chinese mystery snails, they should take a photo, note the location, and report it to the Maritime division of Fisheries and Oceans Canada. The introduction of an aquatic species into non-native waters is illegal under the Aquatic Invasive Species Regulations.

In conclusion, the spread of Chinese mystery snails in Nova Scotia poses a threat to the local ecosystem. Responsible pet ownership and proactive reporting of sightings are essential in managing this invasive species. By working together, we can help protect our waterways from the harmful effects of these snails.