Via DFO
If you spot it, report it!
Red swamp crayfish have been identified in Three Mile Lake, near Lower Sackville, Nova Scotia.
Crayfish are not native to Nova Scotia and they can harm native species.
If you find one, report it to DFO.
https://www.dfo-mpo.gc.ca/contact/invasive-species-especes-envahissantes-eng.html