The sustainability measures for wild-caught seafood and farmed seafood differ. SeaChoice, a Canadian national program aiding businesses and consumers in making ocean-friendly seafood choices, specifies that crucial sustainability factors for wild-caught seafood include maintaining healthy populations of the harvested wild species and ensuring that harvesting techniques do not adversely affect other ecosystem components. In contrast, significant factors for sustainable farmed seafood, or aquaculture, involve using production methods that do not harm wild fish or ecosystems and selecting species low on the food chain to enhance seafood supply.