The European Green crab is a pan-global invasive exotic species. Its detrimental effects are well documented, including effects on eelgrass and soft-shelled clams and have defined the species of crab as an 'ecosystem engineer'. A population control program was initiated in 2009 whereby modified shrimp traps are used to remove as many green crabs from Kejimkujik's estuaries as possible. These management efforts are evaluated through standardized monitoring whereby 14 traps are deployed for the same period of time in the same place annually. By evaluating the standardized Catch per Unit Effort for European green crab, park managers can estimate the general risk to the ecological integrity of other coastal measures. Monitoring occurs for one week in the months of August, September and October in the Little Port Joli Estuary.